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They were sent to identify the spy in their midst. Instead, they'll have to unmask his murderer.

London, 1922. With the temperatures rising, both literally and figuratively, Dora and Rex are thrilled to learn their next assignment is in the Cotswolds. Word on the street suggests a foreign spy is operating in plain sight, masquerading as a wealthy man with a dubious title. Rex is to invite the man to his family home in the rolling hills for a rollicking weekend of fun. In between bouts of lawn tennis and parlour games, he and Dora are to uncover any truth behind the rumour.

The servants barely have time to unpack everyone's case before the suspected spy is found with an antique dagger sticking from his back. With few suspects, the case shouldn't be too hard to solve. But when every door leads to a dead end, Dora and Rex are forced to consider a most unpalatable option.

Were they wrong about the identity of the foreign spy? Or... could one of them be the betrayer?

238 pages, Kindle Edition

First published August 31, 2023

397 people are currently reading
145 people want to read

About the author

Lynn Morrison

80 books233 followers
Lynn Morrison lives in Oxford, England along with her husband, two daughters and two cats. Originally from the US, she has also lived in Italy, France and the Netherlands. It’s no surprise then that she loves to travel, with a never-ending wishlist of destinations to visit. She is as passionate about reading as she is writing, and can almost always be found with a book in hand. You can find out more about her on her website LynnMorrisonWriter.com.

You can chat with her directly in her Facebook group - Lynn Morrison’s Not a Book Club - where she talks about books, life and anything else that crosses her mind.

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5 stars
467 (60%)
4 stars
235 (30%)
3 stars
64 (8%)
2 stars
1 (<1%)
1 star
0 (0%)
Displaying 1 - 30 of 44 reviews
Profile Image for Jonathan.
343 reviews
October 8, 2024
another excellent story from an pen of fine author.
Profile Image for Jill.
116 reviews2 followers
July 1, 2023
Well, it didn’t take long for me to become captivated by this latest episode in Dora and Rex’s world of intrigue. Nothing goes quite how they expect it to and we see Dora uncharacteristically become a little unsure of herself . . . For a short while anyhoo!
I thought I knew whodunnit, changed my mind, changed it back again, then changed it completely and was still wrong! 😆 Ms Morrison cleverly keeps you guessing as to the identity of the murderer, with plenty of twists, turns and unexpected developments along the way before the final reveal.
I very much enjoyed Rex’s increased confidence and continuing development into a valuable member of the team.
There are also developments regarding Dora’s partnership/potential relationship with Rex; she makes a decision, but is it the right one? 🤨
Again I could easily visualise the scenery and characters from the excellent descriptive writing.
Definitely a page turner - I just wanted to keep reading and found myself getting annoyed when I had to stop reading and go do adulting things in the real world!
Profile Image for Debbie Lacey.
337 reviews7 followers
February 19, 2024
Dora and her crew are back in this third installment of Lynn Morrison's Dora and Rex 1920s Mysteries. These characters continue to delight with their sense of humor, steadfast loyalty to each other and the Crown, and their varied skillsets. Dora, known by society as a notorious femme fatale, is a master of disguise and equally believable as a housemaid or a femme fatale, although neither are her true identity. Rex is developing nicely, especially after the disappointing self-doubt he displayed in the previous book, and this team of spies, including Ingrid, Harris, and others, is operating as a well oiled machine. Even so, Dora has decisions to make and people to convince. A family estate in the Cotswolds, complete with secret passages, a secluded setting, a mixed bag of guests, and an inconvenient murder make for an entertaining story. I am pleased that Boob 4 will release sooner than later.

As usual, Pearl Hewitt does an outstanding job voicing these characters.
272 reviews5 followers
May 16, 2025
Fans of Dora and Rex will not be disappointed with the newest book in this captivating series! It delivers an action packed mystery that will keep you guessing ....'who dun it'........ hoping for a nice quiet time resting and entertaining in the country Rex and Dora are soon faced with NOT the scenario they were expecting! They've got the guest of honour murdered and an eclectic mix of guests handpicked by the deceased for reasons unknown to our hosts. Scads of mayhem sprinkled with various quips and actions of the humorous variety to keep us royally entertained! I really appreciate how the author is slowly unveiling the pasts, the talents, and the idiosyncrasies of Dora's team!
So glad I got the first book of the series and I'm looking forward to future books in the series. A must for every mystery aficionado's library whether it be in hard/paper or electronic form!
Profile Image for Paraphrodite.
2,670 reviews51 followers
April 9, 2025
3 stars.

Rex agreed to host Dora's ex-lover and foreign spy in a country house party to find out why he's in England. Then the guy is found killed in the guestroom and the suspects are the guests he wanted invited. To keep the murderer contained, Dora gets her own butler Harris to pose as the local constable to investigate the murder.

But things get more complicated with the unexpected arrival of Rex's grandmother and Dora's brother as well as Rex's incorrigible friend Clark. I have to say I'm really enjoying Clark's character.

There's also some development on the romantic front between Dora and Rex. I still don't know how the author is going to resolve Dora's double identity.
Profile Image for Monica.
1,108 reviews
June 30, 2023
Quick paced mystery with Dora being a very smart lead of a wonderful team. Dora and Rex’s relationship, both business and personal, is growing. Both have family members who help with the mystery. Plenty of suspects had me guessing till the end. Nice nod to Jessica Baker’s Lady Thea series. Wonderful ending and a small hint of the next mission. Wonderfully developing series. Looking forward to the next one.
Profile Image for Larry.
3,042 reviews17 followers
July 1, 2023
Another excellent mystery cozy in an excellent series. I loved this book! Of course I have loved the other two books in the series. It takes a good writer to sustain that taste of adventure in three books, let alone more. The plot is easily followed, the character's become old and trusted friends and the premise is always working well with people you trust with your life and helping others. I most definitely recommend this book.
467 reviews1 follower
July 8, 2023
Down for the Count!

It's very hard to put down. Rex and Dora's plans to out spy a foreign spy go down the drain when the Count winds up dead. Team Dora work every angle to find out who murdered him and what he was after. All of the farce taking place in Rex's home in the country. Red herrings, one after another, stump the sleuths. Family pressures, relationships, and self doubt get in the way of the smashing conclusion.
Anxiously awaiting the next adventure!
689 reviews
July 16, 2023
A Homecoming/Still Spies/A Death Mystery!

From meeting the parents & Rex still holding on to the truth they escape to the country with a few odd guests. One at least is, or was a spy but finding the murderer seems to be a bit of a challenge. Unexpected guests arrive and then with a theft or two is it more or less - a puzzle only for the very best to solve. And of course, loves also in the air.
333 reviews
July 29, 2023
Really enjoyed book 3. Dora and Rex are moving right along as spys and working together beautifully. Now if they can only convince her brother that she is really capable of doing something worthwhile instead of living a life of just parties and fun. Can they solve this next murder together? What's going on with their relationship? I love the characters in these books. They are so real and so human. Can't wait for book 4 to come out. Enjoy.
136 reviews
July 15, 2023
Another win for Dora and Rex!

This was a lovely read as we see Dora and Rex mature into their professional and personal relationships and we get a deeper dive into the support team's backgrounds. Twists and turns are abounding, leading to a surprising conclusion! Sometimes it seemed like the story dragged a bit but the conclusion was well worth the read!
90 reviews1 follower
September 12, 2023
intriguing ….. each book is better than the last

It has been a long time since I read three books without boredom or a break. I have put everything else aside and continued to read. They are delightful, historically interesting and clever enough to hold my attention full time. Thank you and I look forward to #4
Profile Image for Starfire.
1,376 reviews32 followers
September 14, 2023
This was a really enjoyable instalment in the Dora & Rex series - it was great to see Rex really coming into his own as an agent, and getting to see Dora having just that little bit of doubt (plus finally getting seeing Benedict get a sense of what she's capable of)

Looking forward to reading the next one when it comes out.
133 reviews
November 11, 2023
Fabulous series

The third in this series does not disappoint. Rex is now almost fully trained. Their close bond begins to frighten Dora. She worries their relationship may cloud her judgment. Especially since their next mission involves an old flame! As with the first two books, there are many twists and surprises. Can’t wait to read the next installment!
18 reviews
March 26, 2024
Another entertaining mystery

An engaging cast of characters. Well written. A solid mystery with a solid ending. It's refreshing to read a mystery and not have the ending seem like the author realised they needed to send it to the publishers last week. I've read the first two and they are just as good. Starting the fourth one tonight.
Profile Image for Belinda Wilson.
112 reviews5 followers
July 1, 2025
Lynn Morrison at her best!

This next novel in the series showcases the different classes that make up the elite in England. From the penultimate snob to the lowest of the servants, all classes are represented. Each character is crafted so as to evoke the emotions of the reader. The plot is tight and keeps one on their toes as they peruse this tome. A brilliant tale!
443 reviews2 followers
July 27, 2023
Death Undercover 📕book 3

This is a good murder mystery with intriguing character scenes with action,subterfuge and sleuthing.Author is a good storyteller and a good imagination.Loved the dry humour,witty banter and sassy dialogue.Does need some editing ,but not too bad.💃🏻❣️😉🤨
Profile Image for Richard.
413 reviews3 followers
August 12, 2023
Closer to home

Their mission has placed them in Rex's grandmother's home for the weekend along with invited guests (suspects). Rex is the weakest member of Dora's team! I feel even grandmother Edith is a greater asset to Dora!
Profile Image for Kestrelmorn Geiger.
126 reviews
September 14, 2023
My favorite of the series so far, though I'm sure that will change as Lynn releases future books. I would love to tell you why it was my favorite, but that would be *SPOILERS.* So please take my word for it and read ALL of this series. You won't regret it!
271 reviews1 follower
February 22, 2024
One of my favorite series. Some how I had missed reading #2 and #3. Glad I went back and read them. Fills in the background story. Dora, Rex, Inga and Harris are some of my favorite characters in the many mystery series that I read. Really great historical mystery.
100 reviews
February 23, 2024
Dora and Rex continue to find intriguing solutions

There are no unnecessary actions, word or scenes. Everything fits so perfectly together and I am looking forward to more from Lynn Morrison.
She keeps holding interest til the last sentence
Profile Image for Jill.
379 reviews1 follower
June 18, 2024
Best Book in Series (so far)

Really enjoyed the adventure. Love the team that Dora has collected. So cool that Red and his grandmother are now a part of it. Mending family fences and challenging preconceptions is high on Dora's to do list. Fascinating to read how things go.
Profile Image for Mary.
112 reviews
August 27, 2024
This series has steadily gotten better. Rex, Dora, and their cadre of helpers have become a group that I cheer for. The personalities of them all have been well-crafted. Lady Rockingham is quite a character too. I will read more of this series.
Profile Image for Charlene Davis.
1,143 reviews5 followers
July 3, 2023
Fun

Fun to read. Has mystery with underlining comedy and romance. Fantastic scenery with some historical fact that just might peak your interest into the actual events.
Profile Image for Stephanie Curran.
394 reviews1 follower
July 12, 2023
Amazing!

I don’t know what else to say. I love Dora and Rex and their crew. The mystery is well researched and full of red herrings, and the solution ingenious!
18 reviews
October 19, 2023
very enjoyable read!

I’ve come to enjoy this book series immensely! Well written, with words flowing into the next. Looking forward to the next in the series!
Profile Image for Page .
523 reviews1 follower
December 18, 2023
Not my favorite but still enjoyable. This was a bit more about advancing connections than the mystery.
41 reviews1 follower
May 3, 2024
Hijinks and Mayhem

Hijinks, murder and mayhem perfectly combined in a country manner with secrets in its walls. Wonderful engaging story. Impossible to put down.
838 reviews
May 29, 2024
Good mystery. Plenty of clues and several interesting characters. Satisfying end with an interesting setup for the next book.
Displaying 1 - 30 of 44 reviews

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