Murder at the Duomo

Armstrong and Oscar Cozy Mysteries #14

by T.A. Williams

Don't miss the BRAND NEW page-turning instalment in the brilliant, BESTSELLING Armstrong and Oscar Cozy Mystery series by T.A. Williams. A gripping murder mystery set in beautiful Florence featuring a retired DCI and his loyal companion, Oscar.🐶 Even angels can have a dark side...

As the sticky heat of August settles over Florence, Dan Armstrong is ready for a well-earned break—sightseeing with fiancée Anna, daughter Tricia and her fiancé Shaun. But when a British man is found dead inside the city’s magnificent Duomo, Dan’s plans quickly change.

The victim, Tristan Angel, is a super-wealthy arms dealer with a saintly name and a devilish reputation. But what was he doing in the cathedral, and who decided to make it his final confession?

At Angel’s opulent villa in the hills of Fiesole, Dan and Commissario Virgilio encounter a colourful cast of suspects—each one hiding secrets and none too eager to talk. As tempers rise and the heat outside grows ever more intense, Dan and his four-legged sidekick, Oscar, must sniff out the truth before the killer strikes again.

Praise for T A

'Another wholly enjoyable and entertaining instalment to this now long running series with a delicious backdrop, a well crafted and likeable cast, a pacy, well written narrative and a solid mystery at its heart."

What readers are saying about T.A.Williams

'A fun mystery and a good read with descriptions that made me want to go book a flight. Dan and Oscar are a great team and kept me guessing!' Bestselling author Anita Davison

'T A Williams whisked me away to the beautiful Italian riviera in the company of an ex-pat private investigator and his gorgeous doggy sidekick on the case of a missing teacher. What a team, and what an adventure!!' Bestselling author Kate Wells

'The perfect combination of character, setting and plot, heralding an addictive new cozy mystery series!' Bestselling author Debbie Young

'Watching unassuming detective Dan Armstrong wheedle the truth out of folks is great fun. Highly Entertaining read!' Bestselling author Kelly Oliver

'Dan and Oscar are great company in a sun-drenched mystery that keeps you guessing right till the end.' Bestselling author Michelle Salter

Genres: Mystery, Cozy Mystery, Cozy, Italy, Adult, Animals, Contemporary

242 pages, Kindle Edition

Published February 2, 2026

About the author

Firstly, my name isn't T A. It's Trevor. I write under the androgynous name T A Williams because 65% of books are read by women. In my first book, one of the (female) characters suggests the imbalance is due to the fact that men spend too much time getting drunk and watching football. I couldn't possibly comment. Ask my wife...
I've written all sorts: thrillers, historical novels, short stories and now I'm enjoying myself hugely Cozy Mysteries. I lived and worked in Italy for a number of years, married an Italian, and fell in love with the country. I set almost all my books in Italy and I hope that my love from the country shines through my work.
I‘ve lived all over Europe, but now I live in a little village in sleepy Devon, tucked away in south west England. I love the place. That’s why you’ll find leafy lanes and thatched cottages in most of my books. Oh, yes, and a black Labrador.
I've been writing since I was 14 and that is well over half a century ago. I'm now approaching 1 million books sold worldwide and I find it wonderful that people as far away as India and New Zealand are reading and enjoying my work. Thank you to everybody who reads my stuff.

Reviews

[Srivalli (Semi-Hiatus) · Rating 4 out of 5]

3.7 Stars

One Liner: A good addition to the series

It’s August, and Florence is sticky with sweat. Dan (with Oscar of course), his fiancée Anna, go on a sightseeing trip with his daughter Tricia and her fiancé Shaun. However, they don’t expect a dead body in Duomo. Tristan Angel is a super-wealthy arms dealer with quite a reputation. But what was he doing in a cathedral? Who killed him and why?

Dan and Oscar have a case to solve (again)!

The story comes in Dan’s first-person POV.

My Thoughts:

While the mystery is a standalone, it will help if you have some idea about the series. Also, start the series with another earlier book if you want to jump in at random.

It is August in Florence, and touristy time, though the case doesn’t involve them much. While the murder happens in the Duomo, most of the case is tackled elsewhere.

This one has talks of some international politics, terrorism, and all that, but the vibe continues to be cozy. However, it does create a bit of a mismatch in the content and tone. This makes the climax feel lackluster and underwhelming. While it drives home a valid point, there isn’t enough drama to hype it.

Of course, the mystery, as such, is interesting, with many suspects and more thrown our way. Did I guess the killer? Well, yes, though my ‘reasoning’ was a bit off track.

Our black Labrador becomes Officer Oscar as he helps them find important clues right when they need them. What would humans do without him?

There is some development in the overarching personal track, too, so another reason to read a couple of previous books before starting this one. That said, you can still wing it. ;)

To summarize, Murder at the Duomo is an interesting read about guns (too many of them), their suppliers, and a large villa full of suspects.

Thank you, Rachel’s Random Resources, NetGalley, and Boldwood Books, for the eARC. This review is voluntary and contains my honest opinion about the book.

#NetGalley

[Karen L Clarke · Rating 5 out of 5]

As always, I’m never disappointed by the uplifting and lastest adventure of my fav crime fighting duo of Dan & Oscar! 🐾
How could you not love Trevor’s most recent story in this series, set in my favourite country Italy and in one of the most beautiful places in the world Florence.
Having spent a belated 60th birthday there…I couldn’t not help getting lost in the fantastic descriptions of all the spectacular places we visited. Incredible food wine and spectacular scenery everywhere you look!
He brings it to life wonderfully.
There are often not words in any language even Italian to describe what Florence has to offer. Especially, as it Dan and Oscar’s ‘home town’
I never fail to throughly enjoy Trevor’s great way of bringing Oscar to life, the way he continues to create his character! That you so want him to be your best friend too.
He always makes me smile.

Direct quote but not a spoiler…mrs k l clarke has shared this quote with you from a book they are reading: "‘What about Oscar? Shall I leave him with Lina?’ Lina is my PA who runs the office for me and she also happens to be Virgilio’s wife. Since she started working with me a year ago, she has proved to be invaluable, and Oscar loves her. Virgilio grinned. ‘Bring him by all means. An investigation wouldn’t be an investigation without Oscar.’" (from "Murder at the Duomo: A BRAND NEW sun-soaked cozy mystery in the Armstrong & Oscar series from T A Williams (An Armstrong and Oscar Cozy Mystery Book 14)" by "T A Williams"). Start reading it for free: https://read.amazon.co.uk/kp/kshare?a....


I also look forward to seeing where Trevor will take the other regular characters as well as the darker characters in his latest story.
However, even if you’ve not read any of the other books in this series…you can enjoy them as stand alone stories.
However, I don’t doubt that you your appetite will be wetted to read others!


It was great to have Dan & Oscar be fully involved in solving this murder mystery with his friends in the Italian murder squad from start to finish.

I can highly recommend this and all of Trevor’s stories, I have read them all…and as always have the next instalment on preorder.

I’m an avid reader books are my sanctuary and he continues to be one of my favourite authors.
In a world currently full of darkness who doesn’t need the lightness of loosing yourself in a heartwarming story…

As always Trevor thank you ☺️

[VickydpBooks · Rating 4 out of 5]

It’s part of the Armstrong and Oscar Cosy Mysteries book 14 I didn’t enjoy it of if I am hones, I found it boring good story line

At Angel’s opulent villa in the hills of Fiesole, Dan and Commissario Virgilio encounter a colourful cast of suspects—each one hiding secrets and none too eager to talk. As tempers rise and the heat outside grows ever more intense, Dan and his four-legged sidekick, Oscar, must sniff out the truth before the killer strikes again.

[Carola Mac · Rating 5 out of 5]

Great

Armstrong and Oscar a my favourite pair of detectives. Dan is smart and experienced but Oscar has the instincts. The ending was so beautiful, I loved it. I can’t wait for the next one.

[June Price · Rating 5 out of 5]

I thoroughly enjoyed my virtual visit with Dan and Oscar. In fact, there are spots in the book that had me wishing I could just book a flight to Florence. While that's not likely to happen, I found Williams' descriptive passages a great virtual trip as the plot and side stories moved along. Williams had me easily visualizing the setting as he takes us along the ways and byways of Dan's adopted home. While the murder investigation was obviously the focus, I liked the home scenes, too, where we got to to know not just Dan better but his family and associates. Dan is someone who enjoys his occasional involvement in police work outside his usual private detective agency but seems to have a firm grasp on what is really important in his life, his friends and loved ones. Loved his sorta "whatever" attitude toward wedding plans. As for Oscar, he definitely has figured out who the weak links are to snag a doggie treat from, that's for sure, even among the suspects as it turns out.

And, whoa, there are lots of suspects. The victim, Tristan Angel was definitely no angel. Instead, he was deeply involved in illegal arms dealing and surely had countless enemies who'd want him dead. That aspect pulls in intelligence agencies from here and there, much to the displeasure of Commissario Virgillo Pisano of the Florence police murder squad. He's probably Dan's best friend in Tuscany and finds Dan particularly valuable when the English language is needed. Probably doesn't hurt that Dan is ex-Scotland Yard, either. In any case, Angel's closest team members are all suspects. Most likely, you'll find yourself even liking some of them, hoping they aren't the killer.

Bottom line, a fun, interesting, multi-layer mystery with equally interesting characters, both family and suspects. And, of course, Oscar was my favorite. That dog knows how to make friends everywhere. The setting makes me wish I could see it for myself and it was fun to drop out of the mystery vibe at times and see what Dan was seeing. Not being a hot weather fan, either, I bet Dan wanted to jump into a couple of those fountains with Oscar, too. I came into this series late and this is only my second read of the series but I'm hooked and looking forward to the next installment after checking the library for early adventures. Thanks to #BoldwoodBooks for introducing me to Dan and Oscar and giving me this early peek into their lives in beautiful Florence.

[Kathy · Rating 4 out of 5]

Dan and Oscar sniff out murder
The latest Armstrong and Oscar cozy mystery takes place at the famous Duomo in Florence, Italy. Retired DCI Dan Armstrong and his fiancée Anna are entertaining Dan's daughter Tricia and her fiancé at their home in Tuscany. Dan's friend, Commissario Virgilio Pisano of Florence's Murder Squad, calls him for help. A man’s body turns up in a confession booth at the Duomo. How did someone manage to kill him among all the tourists in the cathedral at the time? And who is the man?

Although Dan is there to provide English translation, Virgilio respects Dan's detective abilities. Dan is a former DCI with Scotland Yard. Dan has a way of coming up with new angles, and his dog Oscar often sniffs out new clues. The mystery becomes even more interesting when the victim is Tristan Angel, a wealthy arms dealer. Angel is the CEO of TXS, and some of his top employees are staying at a nearby villa. When another body turns up, it appears to be the equivalent of a locked-room mystery. Oscar's good nose and Dan's deductive skills are put to the test to solve this crime before the police are forced to turn the suspects loose.

I love T A Williams' wonderful descriptions of Florence and Tuscany. You almost feel the heat bearing down and see the beauty of the area. He is also wonderful at describing the fantastic meals that the characters enjoy. But the best is the thoughtfully crafted mystery that unfolds. I also love that Oscar isn't just a mention. The black lab is an integral part of the plot. I am with Dan, a person is highly suspicious if Oscar doesn't like them. The more I read this series, the more I appreciate Viriglio and the other members of the murder squad. This is the 14th book in the series, and it keeps getting better. Every time I read one, I get to experience Italy again.

If you are in the mood for a great mystery with a large helping of beautiful scenery and culinary delights, you can't do better than Murder at the Duomo. Readers who enjoy Martin Walker's Bruno, Chief of Police or Donna Leon's Commissario Brunetti series should consider trying the Armstrong and Oscar series.

Thank you to NetGalley and Boldwood Books for the digital ARC!

[Jan Mawdesley · Rating 5 out of 5]

Dan Armstrong is surrounded by family, and Oscar of course, as they enjoy their evening meal, cooked by Dan as he shows off his recently learned culinary skills. His daughter Trisha is there with her fiancé Shaun as they are planning their soon to be wedding. Trisha would like to have it in the hills of beautiful Tuscany and Anna is helping her with venues.
Dan and Oscar find their peace shattered in Murder in the Duomo, when a call comes from Virgilio, or rather Comisario Virgilio Pisano of the Florence murder squad, to help with what seems to have been a murder at the Duomo, or the Cathedral of Santa Maria del Fiore. The victim is a high-profile British businessman considered as the richest man in the world.
The pressure is on to get a quick arrest before it becomes an international issue, as the murdered man, Mr Tristan Angel is also a major arms dealer, with powerful friends and allies as well as enemies.
As they dig or try to dig deeper into the affairs of Tristan Angel they are blocked at every turn as the people who accompanied Angel to Fiesole, are telling a version of the truth which seems to be plausible but leaves much to be explained.
Who had reason to kill, to carefully plan what now seems to be an execution is unclear, as it seems the murderer is not about to stop at one and anyone of the people still at the Villa may have had reason to kill; they all appear to have cast iron alibies.
In this fast moving, Tuscany style Murder, Dan and Oscar find they are, as are the Police, left confused and intrigued as every lead ends in a dead end. It is only a quirk of fate that may shine a very small light on a person who appears to be blameless. Are they the killer or are they hiding someone else in plain sight?
Murder at the Duomo is once again an excellent cosy murder from TA Williams, featuring a tightly woven, complex plot which leads the armchair detective to false conclusions time and time again. A great and most enjoyable murder once again!!

[Madalyn Marie · Rating 5 out of 5]

Thank you to NetGalley, Boldwood Books, and T.A. Williams for an advanced reader copy of “Murder at the Duomo” in exchange for an honest review.

I really enjoyed this book! This is book 14 in the Armstrong and Oscar Cozy Mysteries series. Although this was the first book I’ve read of the series, I didn’t feel like I was missing out by not having read the first 14 books— I can see how they would all tie-in together (a few references are made to past mysteries in this book), but I would ultimately consider it a cozy stand-alone.

I requested this book on NetGalley because I went to Florence last year (and the whodunit premise was fun), and I was excited to read a book set in Florence— and it did not disappoint AT ALL. T.A. Williams writes really enchanting and beautiful settings, and I think that was actually my favorite part of this book. He literally managed to take me right back to Florence, and I’m so grateful for that!

I also thoroughly enjoyed the mystery aspect of this book. It was never too scary or spooky, and I was able to follow along easily with the characters and the plot. In the beginning, it was a little difficult to keep track of everyone, simply because there were SO many suspects, but the author does a good job of continuing to remind us of who’s who so we’re not floundering through the book.
The subject matter was interesting (a murdered questionably moral arms dealer), and I thoroughly enjoyed the way the author handled the difficult and sketchy details of a scenario like this.
There were moments and details that needed to be handled delicately and with respect, and the author did just that, and I was really impressed with the finesse and care used.

I enjoyed “Murder at the Duomo” a lot, and I will definitely recommend it to anyone that enjoys a clever whodunit and/or also wants a little escape to Florence, Italy! ♥️

[Annarella · Rating 5 out of 5]

After more than a dozen blogtour you know that you need to change something, a review using Saki style (one of my fav writer)

Murder at the Duomo reminds us that placing human beings in a beautiful city only encourages them to behave badly. Florence, with its grand cathedral and its air of cultivated self importance, becomes the perfect stage for a crime committed by people who believe the world exists to admire them. T. A. Williams captures this with the cool amusement Saki reserved for pompous relatives and overdecorated drawing rooms.
Retired DCI Armstrong enters with the air of a man who has long suspected that the world is run by individuals who should never be left unsupervised. His Labrador Oscar remains the only creature entirely free of vanity, which naturally makes him the most reliable presence in the investigation. Armstrong’s private life lingers quietly in the background, a mixture of loss and habit that gives him a dry, resigned wit as he navigates the absurdities around him.
The people he encounters are a splendid parade of self importance. One speaks as if the entire history of Florence were arranged for his personal benefit. Another guards her knowledge with the possessiveness of someone convinced that enlightenment is wasted on the unworthy. The rest drift through the city with the airy confidence of people who believe the world exists chiefly to admire their presence. Each one is a small masterpiece of vanity, and Williams sketches them with a precision that borders on affectionate cruelty.
The mystery unfolds with the calm inevitability of a social disaster at a country house weekend. Armstrong listens, observes, and allows the suspects to reveal their own absurdities. The final revelation arrives with the satisfying snap of a trap closing on someone who richly deserves it.
Highly recommended.
Many thanks for this digital copy, all opinions are mine

[Sara · Rating 5 out of 5]

Originally reviewed for Chick Lit Central (www.chicklitcentral.com)

Is this really the fourteenth book in the Armstrong and Oscar Cozy Mystery series? All of the books are great, with Murder at the Duomo yet another great addition. This time, the original plan for Dan is to spend some much-desired time with his daughter and daughter’s fiance, yet crime never stops for anything!

I like that the reader gets to learn a little bit more about Dan’s family. We’ve heard about Tricia, but it was nice to see more of her in this book, and learn that she’s engaged to be married. Dan is also engaged to Anna, which feels like it’s been a long time coming but well worth the wait. As per usual, Dan is called in to assist on a murder investigation, which is always an intricate, well-researched affair, but this time we’re given more roots to what makes Dan tick by learning more about his family.

The synopsis mentions a colorful cast of suspects, and that is absolutely correct. Given the nature of the situation, no one can leave the villa or enter the villa, which really adds to the pressure of the environment for all of the characters involved. While reading Dan’s checklist, I follow along and create a list of my own, attempting to figure out who might be the culprit, no matter how far fetched it might be, and I found it fun that Dan also had some unbelievable ideas, especially when it involves those he knows who are closer to his neck of the woods. You never really know when an Armstrong and Oscar book is involved.

One by one, suspects are removed, leaving behind the final answer, and as usual, it was the last person I suspected. Dan approaches his theories in a very methodical manner, and it works really well. Murder at the Duomo was a fun five-star addition to this series, and I look forward to many, many more!

[Elaine - Splashes Into Books · Rating 5 out of 5]

What a hot case this proved to be
For Dan, Oscar and their family!
It was supposed to be a holiday time
Not one involving murder and crime!

Visiting Florence should be a real treat
But sometimes there is just too much heat.
Maybe in the Duomo sanctuary could have been sought
But there are twists galore before the murder is caught!

A renowned, wealthy arms dealer is left in the Duomo dead
Who could have been there to shoot him in the head?
There were plenty of tourists around at the time...
Who could have been there to commit the crime?

The victim is Tristan Angel and he'd brought out his team
At a villa on the outskirts of Florence they're all staying, it'll seem.
But when Dan and Commissario Virgilio go to question them there
They seem reluctant any information to share.

With little evidence and so many suspects as well
Who the killer could be is very hard to tell.
But with Oscar alongside to give his aid, too,
They have to hope there'll be a break through.

With temperatures rising - and the suspects' tempers, too.
This intrepid team will search for every clue.
Is this a one-off crime or could there be more?
There's danger around as they don't know for sure!

Another riveting read that had me engrossed from the start
With Oscar again having a very special part.
This author give fabulous descriptions bringing everything to life
Including his characters, the scenery, the food - and the strife.

For my copy of this fantastic book I say a huge thank you
As I share with you this, my honest review.
I thoroughly enjoyed escaping into it and hope you will too
As it is a read I highly recommend to you!

[Paloma · Rating 5 out of 5]

Murder at the Duomo is an exciting murder mystery set in the beautiful background of Tuscany's sunsets. There are too many suspects and even more motives.

Dan Armstrong and Oscar are back with a very complex murder. As Dan, his fiancé Anna, his daughter Tricia with her fiancé Shaun search for locations for their weddings, a murder puts their search on hold. A world renowned arms dealer and one of the richest men in the world is shot inside the Duomo (The Cathedral of Santa Maria del Fiore). Commissario Virgilio Pisano will need Dan and Oscar's help solve this murder. But things start getting harder to decipher when Donald Hicks, Tristan's right hand is poisoned inside Villa Botticelli where all of Tristan's employees are staying. After a failed attempt at shooting Vincent Archer, one of Tristan's directors, it becomes apparent that someone is trying to take out the main employees of the company.

It is always so nice to see beloved characters return in a series that you love. I enjoyed reading more about Dan as a future husband and father. I felt like Oscar was extra funny this time around following beautiful women and always looking like he is being starved. Though Dan is helping solve murders, he also gets to enjoy the beautiful things that Italy has to offer. His walks are always so soothing. Another great read from one of my favorite authors!
Thank you Netgalley and Boldwood Books for this eARC. All opinions are entirely my own.

[Susan Johnston · Rating 4 out of 5]

Retired DCI Dan Armstrong lives an idyllic life in Tuscany with his Lab, Oscar. He has found love and he spends his time as a PI, mostly used by his best friend to help him investigate murders. His knowledge and contacts prove invaluable when the current corpse is a British arms dealer who straddled the line between legit and illegal. Angel is a fascinating man. Depending on whom they question, he was either a really good bloke or he was vermin. Clearly he dealt with many corrupt individuals in the nether regions of the world so the first suspicion is one of his enemies had him snuffed. The crime was committed in the confessional of the Duomo and it soon becomes probable that the murder was committed by one of his associates who were staying with him in his villa in the hills above Florence.

Dan brings Oscar when he visits the villa throughout the course of the investigation. Good thing too. Oscar has the “nose” for clues and helps move things along more than once. Also visiting at this time is his daughter and her fiance. They are looking at wedding venues. Because her fiance served in the same guards unit as the deceased, Dan must briefly wonder if they might be any connection beyond coincidence. It is always an enjoyable read as the two grapple with crime in sun-drenched Italy. It also makes me want to climb a plane and go exploring.

Four purrs and two paws up.

[Liz · Rating 3 out of 5]

3.5 stars. A fun cozy mystery set in beautiful Florence.

Dan Armstrong has been enjoying a relaxing summer with his fiancée Anna, daughter Tricia, and her fiancé Shaun. Then a British man is found dead inside the Florence Duomo. Tristan Angel was a wealthy arms dealer and an interesting group of people joining him at a villa in the area. Dan and Commissario Virgilio need to figure out everyone's secrets before the killer strikes again.

This is a fun cozy mystery series and I really enjoy the Florence setting. It's described to capture the beauty (if somewhat ignoring the tourist crowds) and lets us get a taste of the city and the surrounding countryside. The mystery itself has many possible suspects, which keeps it interesting. An, of course, Oscar the dog is adorable.

I think the pacing was not my favorite, and perhaps there were too many people as potential suspects as they were difficult to tell apart at times. The writing is clear, but maybe not my favorite voice to read from.

Overall, if you enjoy cozy mysteries, definitely give this one a try. It's a fun story, perfect to enjoy with a prosecco or an aperol spritz to feel like you're there in Florence.

Thank you to NetGalley and Boldwood Books for providing an advanced copy of this book for review. All opinions are my own.

[Lorraine Dias · Rating 5 out of 5]

When one of the world’s wealthiest men, a British arms dealer, is found murdered in Florence’s landmark Duomo, private investigator Dan Armstrong is forced to put sightseeing with his daughter and her fiancé on hold to assist the local police. But can they solve the case without interference from various intelligence agencies?

With Murder at the Duomo being the 14th book in the Armstrong and Oscar Cozy Mysteries, the latest instalment feels like catching up with old friends. I first started reading the series in anticipation of a trip to Italy, and now T.A. Williams’ beautifully descriptive writing brings back happy memories of stunning Italian scenery and delicious food.

This instalment raises the stakes, with a high-profile victim, the involvement of intelligence agencies, and a wide scope of individuals and organisations with potential motives. Armed with his dry sense of humour and guided by Oscar, Dan and his friends in the police force work to narrow down the suspects, but new information keeps coming to light.

It’s always fun to follow the investigation and try to solve the case alongside the characters, and I highly recommend this cozy mystery. I loved the ending and hope that Dan and Oscar have many more mysteries ahead of them.

Thank you to T.A. Williams, Boldwood Books, and NetGalley for the digital ARC.

[Mystica · Rating 4 out of 5]

Oscar is the sidekick but a very important one. Uncovering clues at a vital part of an investigation and helping to push it forward is his specialty. We have his boss the retired English private investigator, who lives in idyllic Tuscany with Anna his partner. The other party is Commissario Virgilio who calls on Dan when an investigation involves the English.

This one was a puzzle. A crowded cathedral, the Duomo. Tristan Angel found murdered in a confessional with professional skill. Tristan, an extremely wealthy arms dealer, secretive and close lipped had come with a bunch of associates to his villa in Tuscany to fine tune business. Whom he was going to meet no one knew, and the investigation is hindered mainly by the lack of general knowledge of the inner dealings of this conglomerate. When a second murder by poison takes place within the villa itself the number of suspects is confined to the associates themselves, and then the third attempted murder which was not successful reconfirms. Now the painstaking background check starts and what links may have been missed.

With accounts of scenic Tuscany plus the mouth watering food, and the mystery murder is very much a page turner. The story held my interest throughout because once the initial suspects became themselves victims, it was not easy to find the actual murderer.

[Allison Collins · Rating 5 out of 5]

The Armstrong & Oscar series from T A Williams quickly became one of my all-time favorite series from the first book I read. I truly look forward to reading the new ones as they come out!

In Murder at the Duomo, we get to know Dan’s daughter Tricia and her fiance Shaun as they arrive in Florence for a visit, sightseeing, and looking for a wedding venue. Dan is soon called to help translate in a case involving a British man, an uber-wealthy dangerous arms dealer who is killed in, of all places, the confessional of the beautiful, historic Duomo in Florence. Suspects abound in his houseguests, as well as his ex-wife, who just so happens to be in town.

There are many reasons I enjoy this series: the plots are intricate and well thought out, the characters are fleshed out and true to life, and of course Oscar, Dan’s beloved companion, who really makes me laugh with his human-like expressions, and his uncanny ability to help solve these mysteries. The author is so good at writing the setting I always come away wanting to fly immediately to Italy and immerse myself in Dan and Oscar’s world.

Thank you to NetGalley and Boldwood Books for letting me read an advanced copy of Murder in the Duomo. I am very happy to share my opinion of this great series.

[Joan · Rating 4 out of 5]

I like this cozy mystery series mostly because of the settings. Williams does a great job of taking us on location, seeing and experiencing the buildings and landscapes. Here we get to experience the Cathedral, or Duomo, in Florence, both the beautiful exterior and the more plain interior. Dan and Oscar roam around various areas so we experience scenes overlooking the city too.

The mystery is good, taking us into the world of arms sales, exploring the ethical nature of selling arms to various entities. The possible suspects are many and it takes in depth investigation by the local Commissario with the help of Dan and his contacts from his previous government work. But the hero is Oscar who manages to find an essential clue.

This is a good cozy mystery for readers who like ones set in unique places and have interesting characters. There is a good balance of investigation and Dan's personal life. Williams' writing style is clear and entertaining. While it is down the line in the series, it reads well on its own.

I received a complimentary egalley of this book from the publisher. My comments are an independent and honest review.

[Scilla · Rating 5 out of 5]

This is a great series! Armstrong is a former member of the Scotland Yard murder crew, and is now in Tuscany. He has his own detective agency, and helps out his good friend Virgilio, who is Chief of Police in Florence, especially when the people involved are English speakers. Oscar is Armstrong's Labrador, is with Armstrong almost all the time, and helps with most of the cases. This case is about a company that sells weapons to folks who shouldn't have weapons. The company owns a villa in Florence and several of the top employees are there for a meeting. However, on the first day, the Chair of the Board is murdered in a confession booth in the Duomo. There seem to be a lot of guns in the house and some tension among the folks in the company. Soon, there is another murder which is of the 2nd in command of the company. However, they finally figure out who has been murdering the bosses. Oscar has an important role in finally catching the murderer.

I thank Netgalley and Boldwood Books for the ARC so that I could read the book before publication.

[Louise Wilson · Rating 4 out of 5]

Armstrong and Oscar #14

As the sticky heat of August settles over Florence, Dan Armstrong is ready for a well-earned break - sightseeing with his fiancee Anna, daughter Tricia and her fiance Shaun. But when a British man is found dead inside the city's magnificent Duomo, Dan's plans quickly change. The victim, Tristan Angel, a super-wealthy arms dealer with a saintly name and a devilish reputation. But what was he doing in the cathedral, and who decided to make it his final confessional at the Duomo?

This is a descriptively written story. Dan Armstrong is a former member of Scotland Yard's murder crew. He now has his own detective agency. Dan and the Italian police are investigating who killed Tristan Angel in the confessional at the Dummo.

I quite liked this cosy murder mystery. It does read well as a standalone.

Published 2nd February 2026

I would like to thank #NetGalley #BoldwoodBooks and the author #TAWilliams for my ARC of #MurderAtTheDuomo in exchange for an honest review.

[Colin Bell · Rating 4 out of 5]

Dan, a retired DCI who now runs a detective agency in Florence, is called in again by the local police when a British arms dealer is found dead in a confessional box in the Duomo, the cathedral. He had been staying in the firm's exclusive villa, where other senior members from the company are also staying.
Although this is the 14th book in this series I've only read one previously, which I did enjoy, and it is readily read as a standalone. It is a slow paced book, so maybe not for those who enjoy faster paced books, but I do prefer books like this. Again the location is stunning, I've only visited briefly but I'd love to go back again. There is a varied collection of suspects staying at the villa and it is really difficult to work out who is the guilty person. He is aided as ever by his faithful companion Oscar, an ever-hungry Lab, who has many uses from finding clues to reassuring witnesses. Something to read to warm you up on a cold winter's evening.
I received an advance copy of this book from the publisher through Netgalley, however this did not influence my review of the book.

[Joan Jordan · Rating 5 out of 5]

PI Dan Armstrong is enjoying a visit from his daughter and her fiancée in Florence. However, when it is determined that a body found inside a confessional booth at the duomo is an Englishman, Commissario Virgilio calls on Dan, and his dog, Oscar, to help discover who would want the man, an extremely wealthy arms dealer, dead. Since the man made arms deals with questionable people, the candidate list is long. The main suspects, though, are his staff members who are gathered at his villa. When one of them also dies under questionable circumstances, Dan and Oscar, along with Commissario Virgilio work hard to uncover the company's secrets before someone else dies.

I've read other titles in this series and enjoyed them all. Because it's a cozy mystery, I appreciate that there's no gore, nor is there profane nor vulgar language. The mystery keeps the reader engaged, and Oscar is the kind of canine pal everyone wishes to have.

Thank you to NetGalley and the publisher for the ARC. All opinions are my own.

[M.J. · Rating 4 out of 5]

Murder at the Duomo is somehow the 14th book in the Armstrong and Oscar mysteries, and I've read them all (apart from 1, which I seem to have missed).

This time, Dan and his friends in the Italian police force are faced with their most impossible case so far. Who killed Angel in the confessional at the Duomo, and how did they do it?

Often, these cases are very hard to solve until something becomes obvious to Dan or Oscar, and then they become quite clear-cut, but that's not the case this time. It does make some aspects feel a little repetitive with such a small collection of suspects. It does mean that when the solution finally becomes evident, the ending is quite exciting.

I do love these mysteries, even if they entirely put me off ever going to Tuscany, which is evidently too hot and too busy for my liking. I think I'll let Dan and Oscar continue to enjoy it (or endure it) on my behalf.

[Euge Fernandez · Rating 5 out of 5]

My favorite duo 🐶 is trying to discover who killed an English arms mogul Tristan Angel, who everyone wants dead, even his ex-wife that is in Florence at the time of the murder, conveniently…
Dan could not catch a break, he was supposed to wander through the beautiful city with his fiancée, Anna and with Tricia and Shaun: her daughter and her fiancée and of course, Oscar!
As a former London Police, now a PI is asked to help the local police. Angel died in a confessional at the Duomo di Firenze who was believed to have met someone. At the deceased’s villa, where his entourage live while they accompany him everywhere he goes, everyone is a suspect but with the help of Oscar, every task is easier!
The Italian riviera is a perfect setting for this book, I always enjoy this couple of PIs
Thanks to the author, Boldwood Books and NetGalley for the advanced copy.  #MurderAtTheDuomo #NetGalley #BookReview #TAWilliams #BeachReads2026  

[Lynda · Rating 4 out of 5]

The fourteenth in the Armstrong and Oscar cosy crime series following ex DCI Dan Armstrong and his black lab Oscar as they solves crimes around Italy. Dan is relaxing in Florence with his partner Anna, and his daughter and her fiancé, when he is asked to help on a case involving the murder of an arms dealer in the Duomo (cathedral).

Briefly, visiting the victims villa in Fiesole, with Commissario Virgilio, Dan finds a plethora of suspects so there is plenty for the pair to investigate. When a further murder occurs and still no clear suspects emerge it is clear they, along with the local police, need to up their game.

Using the delightful background of Florence and its neighbouring surrounds we are treated to a discourse on Italian food as well as the antics of Oscar as he helps Dan. I do love it when Oscar gets a starring role. With a surprise from his partner Anna at the end this was a really enjoyable read.

[Pam Robertson · Rating 4 out of 5]

With an Arnstrong and Oscar Mystery, you are always sure of a carefully plotted story with several red herrings and alternative possibilities. This cozy crime series is always true to its characters and with each one, you feel you get to know Dan Armstrong a little bit more. Dan's daughter is featured in this story as she stays at his villa and introduces her fiance. There is a lot of talk about weddings and Dan's own forthcoming marriage is discussed as well.

There is plenty of detail in this story with several characters to examine. Most of the action takes place in Florence in one villa which the visitors are unable to leave. As ever, Oscar has a big part to play in the investigation and is welcomed by the Italian police as well as the reader! This series is an endearing whodunnit, full of the sights and sounds of Italy and offers an entertaining read for any of Trevor's many fans.

In short: cozy crime feast
Thanks to the publisher

[Marlene · Rating 4 out of 5]

Dan's daughter and her fiance are visiting Dan and Anna in Tuscany. The women are bonding over wedding plans and sightseeing is on the schedule too.
When Tristan Angel , an arms dealer is found dead in a confessional in Florence s Duomo, Virgilio enlists Dan's help in solving the crime. Angel's staff is staying at an opulent villa outside town where another member of the group is found dead. Suspicion moves from a disgruntled customer to yet another of Angel's staff when it's revealed that there's disagreement over selling arms to questionable groups. None of the group is willing to talk despite all realizing they could be the next to be killed.
Oscar plays a vital part in solving the case and is rewarded with a steak!
The author strikes a perfect balance between the characters personal lives and solving the crime. I hope Williams never runs out of Italian locations in which to set his man and dog stories.

[S Mille · Rating 4 out of 5]

Dan is a retired Scotland Yard detective, now living in Italy; Oscar is his black lab. Dan retired two years earlier nominally to become an author. I believe as a retirement gift, he was given a writing seminar in Italy. He loved the country and soon moved there. His writing career has taken a bit of a back burner to his new career as a PI.  This case starts with a body found, with no ID, in an out of service confessional in le Doumo the Florence’s historic Cathedral. There is one clue to his identity: some custom made shoes. Commissario Virgilio, head of the investigation and good friend of Dan, asks for his help. Dan agrees and helps solve the case.

The Dan and Oscar series are the ultimate beach read - cosy, comfortable, and entertaining. There’s even a dog; what’s not to love? Recommended. I received a copy of this from NetGalley.com that I voluntarily chose to review.

[Katie Lavoie · Rating 3 out of 5]

Another cozy trip with Dan and Oscar!

If you’ve read this series before: you get all the best aspects of this series - Dan and Oscar, their friends, the charming town, and writing that will make you want to book a flight to Italy asap. However, it wasn’t my favorite mystery of the series. It felt a bit too broad, with the ending being both lack luster and failing to tie up all the loose ends.

If you haven’t read this series before: it is a standalone part of a broader, interconnected series. So technically you can read this, I just personally would recommend reading one of the older ones since k think their mysteries tend to be a bit more tight and tidy.

Thanks to T. A. Williams, Boldwood, and NetGalley for providing me with an advanced reader copy in exchange for an honest review.

[Miki Jacobs · Rating 5 out of 5]

It's August in Florence and it's hot. Dan and Oscar are looking forward to spending time with his fiancee Anna, and his daughter and her fiance.
Things change when a body is found in one of the confessionals in the Duomo. Virgilio, the local Police Commissario, asks Dan for his help in identifying the body.
They discover that it is Tristram Angel, the CEO of arms company TXA. He was staying at his villa with various people from his company and they are all suspects.
Slowly Virgilio and Dan, with the help of Oscar start to work on why he would have been killed. There are red herrings along the way and another murder. Will they catch the killer before they have to let the occupants of the villa go?
A nice cozy crime with beautiful descriptions of the Tuscan countryside.