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Embark on a seafaring murder mystery from Greece to Constantinople with Matthew Fairchild, his loyal dog Oscar Wilde, and Sylvain Verlac, a captivating Parisian Shadowhunter.

Most travellers are running from—or searching for—something. But not Shadowhunter Matthew Fairchild and his loyal golden retriever, Oscar Wilde. No. Matthew is searching for himself aboard the Majestic, a grand 19th century ocean liner sailing from Greece to Constantinople.

Matthew wants nothing more than to mourn the death of a friend and peacefully enjoy his travels before reuniting with his friends James Herondale and Cordelia Carstairs at the London Institute of Shadowhunters—a secret society of angel-blooded humans who protect the mundane world from demons and Downworlders. But that’s interrupted when someone is murdered on the ship—and a vampire Downworlder lurks in the darkness.

Together with Sylvain Verlac, a mysterious and captivating Parisian Shadowhunter with a secret grief of his own, Matthew must find the murderer on the Majestic before death strikes again.

112 pages, Hardcover

First published May 1, 2025

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About the author

Cassandra Clare

197 books279k followers
Cassandra Clare was born to American parents in Tehran, Iran and spent much of her childhood travelling the world with her family, including one trek through the Himalayas as a toddler where she spent a month living in her father’s backpack. She lived in France, England and Switzerland before she was ten years old.

Since her family moved around so much she found familiarity in books and went everywhere with a book under her arm. She spent her high school years in Los Angeles where she used to write stories to amuse her classmates, including an epic novel called “The Beautiful Cassandra” based on a Jane Austen short story of the same name (and which later inspired her current pen name).

After college, Cassie lived in Los Angeles and New York where she worked at various entertainment magazines and even some rather suspect tabloids where she reported on Brad and Angelina’s world travels and Britney Spears’ wardrobe malfunctions. She started working on her YA novel, City of Bones, in 2004, inspired by the urban landscape of Manhattan, her favourite city. She turned to writing fantasy fiction full time in 2006 and hopes never to have to write about Paris Hilton again.
Cassie’s first professional writing sale was a short story called “The Girl’s Guide to Defeating the Dark Lord” in a Baen anthology of humor fantasy. Cassie hates working at home alone because she always gets distracted by reality TV shows and the antics of her cats, so she usually sets out to write in local coffee shops and restaurants. She likes to work in the company of her friends, who see that she sticks to her deadlines.

City of Bones was her first novel. Sword Catcher is her most recent novel.

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5 stars
141 (26%)
4 stars
241 (44%)
3 stars
132 (24%)
2 stars
21 (3%)
1 star
5 (<1%)
Displaying 1 - 30 of 220 reviews
Profile Image for Beenish.
458 reviews460 followers
Review of advance copy
March 3, 2026
All stars for Matthew Fairchild! | Idk how to rate this because really, I didn’t care, but also, I did (maybe) say that I’d read anything with Matthew in it sooo... yeah, this was something with him in it 😅🫶🏼

Not to say that I wasn’t disappointed, but I feel like there’s no point in if-only’s, and if this is how his life has been written, I’m just glad that he’s finding happiness.

we are a people who put ourselves in danger over and over and therefore sometimes we will lose others, or be lost ourselves. We can’t bear that, so we tell ourselves there is something we could have done. It isn’t true.



a story from
Careful of Books — 2.5★
Profile Image for Rebecca Thompson.
109 reviews4 followers
February 9, 2026
Thank you Cassandra Clare and NetGalley for the eARC

I absolutely adored this book! It was short and sweet and I loved everything about it.

Getting to read about Matthew again brought me so much joy! It was nice that we got to see him getting better and fall for someone. The new characters were brilliant and hearing about old characters again warmed my heart!

The murder mystery was engaging and easy to follow. The balance between plot and romance was good and I thought the length of this short story was perfect as it got straight to the point.

Profile Image for Tilly.
1,773 reviews256 followers
May 13, 2026
2.5 Stars

Sadly this was way too short, rushed, basic storyline, not enough depth and development plus a super rushed romance which held little chemistry or connection.
I am sad as was looking forward to a Matthew story but this just wasn't it.
Profile Image for Elle Cheshire.
549 reviews41 followers
May 14, 2026
Matthew is one of my favourite Shadowhunters so I was overjoyed to get a novella for him, to see how he’s doing and what his future might hold. And this was such a delightful story! It’s a short one, only 110pgs but it managed to pack a lot in.

The cruise liner was a great setting, decadent and isolated, perfect for a little mystery that the only two Shadowhunters on the boat are forced to look into, considering the vampire population. Matthew is still searching for that nebulous thing he set out on his travels for, not quite ready to return to London after everything that happened in The Last Hours. But he finds Slyvian, a French Shadowhunter, running from his own past. Together they find what they both need. It was heartfelt and sweet. I loved seeing Matthew healthier and healing and Slyvain was a great mirror for Matthew to process his own feelings and the perfect one to help Slyvain.

And the little mystery was fun! Matthew doesn’t have James to lead but he’s the perfect man to deal with a vampire theatre troupe. All in all, a wonderfully quick, sweet story that gives Matthew a bright future and a wholesome step in healing and Slyvain was a perfect complement and addition to the shadowhunter verse. I’d love to see a follow up of Slyvain meeting the other Last Hours characters!




Thank you to the publisher for the review copy. All thoughts are my own
Profile Image for Izzy | _bookstage_.
251 reviews18 followers
Review of advance copy received from Netgalley
February 23, 2026
O universo de Shadowhunters sempre foi um dos meus favoritos e poder ler esta pequena novela do Matthew Fairchild foi incrível.

Em primeiro lugar, muito obrigada à Netgalley, à Cassandra Clare e à editora por esta oportunidade.

Sinto que para mim a escrita da Cassandra Clare está cada vez melhor e mais viciante. Li esta novela a voar!!

Adorei a história, o pequeno plot misturado com o romance ficou muito atrativo e interessante. Adorei esta dupla honestly! E deu para matar as saudades que tinha deste universo lindissimo.

Um otimo livro para ler numa tarde em que queremos recordar este universo e nos sentir nostálgicos com os personagens.

🇬🇧
The Shadowhunters universe has always been one of my favorites, and being able to read this short novel by Matthew Fairchild was incredible. First of all, thank you so much to Netgalley, Cassandra Clare, and the publisher for this opportunity. I feel that Cassandra Clare's writing is getting better and more addictive for me. I read this novel in a flash!! I loved the story; the little plot mixed with the romance was very attractive and interesting. I honestly loved this duo! And it helped satisfy my longing for this beautiful universe. A great book to read on an afternoon when you want to remember this universe and feel nostalgic with the characters.
Profile Image for Booksandmoe.
346 reviews66 followers
May 6, 2026
A Sea Change is a truly heartwarming novella that felt like a gentle return to a character I already loved. I was especially excited to spend more time with Matthew Fairchild after the Last Hours trilogy, and this story delivered exactly that. We follow Matthew as he works through his grief and deep loneliness, trying to figure out how to move forward and allow himself happiness again. That emotional journey sits at the core of the novella and gives it a quiet, reflective depth.

Matthew continues to be an absolute joy to read. His wit, vulnerability, and complexity make every scene engaging, and I honestly would read twenty novellas from his point of view without hesitation. Being inside his thoughts adds so much richness to the story, especially as he navigates his internal struggles.

There is also a thread of romance woven throughout. It does develop a bit quickly, which kept it from feeling fully grounded at times, but it was still lovely to see unfold. The emotional sincerity behind it makes it easy to root for, even if the pacing feels a little rushed.

Overall, this novella is a warm and comforting addition to the Shadowhunter world, with a strong emotional core and a character who continues to shine. It left me wanting more of Matthew’s story, which feels like the best kind of ending.
Profile Image for Bee.
379 reviews15 followers
March 26, 2026
I received an arc, this is my honest review.

I loved this. Any insight into the Shadowhunter world and I’m there like a rash you can’t get rid of.

Matthew was one of my favourite characters so when I heard he was getting his own novella I just had to reach out and grab it.

Matthew and Sylvain’s relationship is very sweet. They’re both dealing with trauma in different ways and are able to help each other deal with that trauma while also solving the mystery of a murder that happens onboard the ship they’re travelling on.

I’d honestly be so down for more novellas of Matthew and Sylvain solving more murders, almost like a Sherlock Holmes kind of thing. Well, a girl can dream.
Profile Image for Danielle Hilliard.
235 reviews10 followers
April 29, 2026
A really quick and sweet novella...really a short story that brings us back to Matthew post Chain of Thorns which shows him accepting his grief for Kit and finding some love. I really wish there was more to this story and I am now left wondering if Matthew and Sylvain are end game.

Definitely one I would recommend, especially if you needed some closure after The Last Hours series.

Thank you to Daphne Press and Netgalley for the eARC and because I find myself having a very big Shadowhunter day with this and 2 of the The Mortal Instrument graphic novels read today, I have left an honest review.
Profile Image for Lisa.
23 reviews5 followers
May 8, 2026
An enjoyable quick read, but quite a rushed story and a bit underdeveloped.
Profile Image for Ashley Kane.
195 reviews1 follower
May 14, 2026
4⭐️
Even though it was a little novella it was so important for Matthew and I am tearing up i love him 😭
Profile Image for Odette.
281 reviews13 followers
Want to Read
April 1, 2026
10 AÑOS AQUI Y AUN ASI ANDO PERDIDA CON LAS ULTIMAS EDICIONES POR???

Lo voy a leer pero aja sigo cagada de risa porque cassandra vendió el paquete "exclusivo" que según tardo siglos en llevarles a los compradores, para que meses después saliera con que lo único premium es la edición (ni esta tan chida) y el libro viene con el mismo contenido LOL,

en fin, los quiero leer porque TSC es mi saga fav pero NO le voy a COMPRAR NADA A CASSANDRA
AUN SIGO EMPERRADA CON SU CAGADERO DE THE LAST HOURS
Profile Image for Bel ♡.
307 reviews
April 13, 2026
A quick, short read! This was absolutely lovely! I loved being reunited with Matthew’s character - I love that this filled in the gaps in how his character coped with the ending of Chain of Thorns as well. Alongside the murder mystery on a cruise ship (ft. Vampires) storyline, I really liked the dynamic between Sylvain and Matthew. Although the story is quick, it explores the topic of grief very well. The final dream Matthew had about Christopher had me tearing up 🥹 this felt like a beautiful homage to Kit’s character as well, and I felt like it did a great job at emphasising the impact of the loss that the friendship group felt during CoT and beyond that book as well.

Overall, I had a great time and highly recommend this to anyone who wonders how Matthew’s character went after the CoT aftermath.

Thank you NetGalley and the publisher for the complimentary advanced readers copy in exchange for an honest review. As always, all opinions in this review are my own!
This entire review has been hidden because of spoilers.
Profile Image for Caro.
1,595 reviews
Review of advance copy received from Netgalley
February 11, 2026
Oh Matthew, how I love thee, you poor tortured soul.

He’s been travelling with the lovely Oscar, he’s on his way home, and yet he still feels lost…

'When I set out at first, it was to find something. And I just can’t say I’m sure I’ve discovered it yet.'

Then there’s a murder. And then there’s Sylvain (what I wouldn’t give to hear him say 'Mathieu'!), so what’s a Shadowhunter to do but investigate?

It’s been a while since I last read a Shadowhunter book. I’ve reread most of them at least twice, and The Infernal Devices at least five times (Will H forever!). But reading this felt like stepping back into that world—falling in love with it all over again. Steles, the Merry Thieves, parabatai, runes, the Clave, Mundanes, Downworlders… I realized how much this world and these characters mean to me. They don’t just feel familiar. They feel like home.

'I am always with you.'
Profile Image for Sofia&#; thebookishpalss.
239 reviews6 followers
February 22, 2026
4.5⭐️


Such an heartwarming novella, i absolutely loved being back in the Shadowhunters world! The best part of this book was definitely having Matthew’s pov, seeing him be finally HAPPY without reservation and letting go of that sense of guilt that he’s been carrying for so long!

This novella was also needed to say a proper goodbye to a certain beloved character from The Last Hours🥹 and i love how Cassandra Clare cannot resist mentioning Will in all of her books, she’s just like me😂

The romance was also so cute, especially towards the end! The mystery part didn’t overwhelm the story but i really liked how Matthew solved it! Overall i feel like this novella was very much needed and i’m so happy I read it!

Thanks so much to Daphne Press and Netgalley for a free arc, all opinions are my own!
Profile Image for Sara.
107 reviews1 follower
February 5, 2026
How can a book that short be this moving? It really was everything. It’s perfect.

We got to see Matthew getting better.
We got to see our favourite shadowhunter dog, Oscar.
We got to see Will haunting the narrative.
We got to see a little bit of Christopher.
We got to see the love Matthew has for the Merry Thieves and his friends.
We got to meet new characters.
And we also had a little bit of romance.

What I did not get to see was the screen of my kindle at the end of the book because of my tears (though they weren’t sad tears, i promise). And with that thought i’d like to say that i 100% recommend this book if you love shadowhunters and read the last hours series, because you’ll love it (hopefully) as much as i did. Thank you NetGalley and Daphne Press for providing me an earc of this book, i am forever grateful for this.
Profile Image for Cindieslibrary.
226 reviews10 followers
Review of advance copy received from Netgalley
February 9, 2026
A new Shadowhunter novella is on its way, this being a murder mystery on a ship to Constantinople. Matthew has been travelling for quite some time leaving the institute, his friends and family behind to go looking for something only wanting to return when he finds what he’s looking for. Under a fake name and having glamoured himself so the mundane folk won’t see he’s different, he hopes for a smooth time aboard, but that’s wishful thinking. There is another shadowhunter on board but also vampires and when a mundane gets killed, it's just another day in the office.

Want to read my full review on this novella? You can find it here; https://cindieslibrary.com/a-sea-chan...
Profile Image for Eilis Dunne.
148 reviews3 followers
Review of advance copy received from Netgalley
February 10, 2026
This was a really fun and cute novella. It's fun to dip into the Shadowhunters world every now and then with these shorter stories. Matthew and Sylvain were adorable together and I liked the added element of danger and mystery with thw vampires. It was really nice seeing them both running from grief and find each other amid a murder mystery on a ship - genuinely a really fun setting.

It was a little insta-love for me but I also appreciate in a novella theres no time to have a slow burn.

Thanks Cassandra Clare and NetGalley for the ARC!
March 22, 2026
As a Cassandra Clare fan I enjoy all her work and how they interact with one another. This was no different it showed a little story of Matthew in which it is based on a boat. I love the concept of this. It did grip me but I wanted more in my opinion which is why I rated it 3 and not higher. I think the style of writing is different than her other work. And don’t get me wrong I don’t expect all her work to be the same but there was just something missing for me personally. But on the positives loved 🥰 the characters engagement throughout the book and the dialogue. Thank you for my advanced copy :)
Profile Image for Lana | Libraryofabibliotaph .
611 reviews24 followers
Review of advance copy received from Netgalley
February 24, 2026
It’s been a few years since I’ve read a Shadowhunter book, yet it took me no time at all to get back into this world with Matthew’s novella. Even though I would have liked for the story to be longer and consequentially have some more depth, I really liked it. The balance between mystery, romance and self-reflection is perfect. In The Last Hours, Matthew proved to be one of my favourite Shadowhunter characters, and this story only confirms those feelings. He’s very layered and unique, making him interesting to read about. A Sea Change does his character justice and gives unique insights into his thoughts. Hopefully we get to see more of him and Sylvain (and Oscar ofcourse) in the future.

Thank you Daphne Press for the eARC.
Profile Image for Jules (Taylor's versión).
153 reviews4 followers
May 2, 2026
Es muy fácil de leer , y muy rápido. Se nota que es una historia para fans debido a que no hay grandes acontecimientos, es un poco de saber que pasa con Matthew Al final de Cadena de espinas.
Tranquilamente esto pudo estar dentro de Better in Black , pero fue lindo , tranqui , si te gusta Matthew te gustará, aunque yo esperaba un poquitin más
Cuatro estrellas por Matthew que se perdono, por el amor, por Oscar Wild, y por menciona a James y Cordelia y Christopher
Profile Image for Lucy &#x1f940;✨&#x1f5a4;.
182 reviews4 followers
February 12, 2026
Thank you Cassandra Clare and NetGalley for providing me with an e-arc for this!

It was so good to be back in the shadowhunter world again, following Matthew and his dog Oscar 🥹
A short, moving novella about dealing with grief and how moving on isn’t always such a a bad thing - the romance was great and the murder mystery plot was throughly engaging!
Profile Image for Tasha Byard.
10 reviews
April 29, 2026
Look, if Cassandra writes it, i’m reading it.

I wish we had decimal scoring on Netgalley, overall I would give this 4.5/5.

MATTHEWWWWWW, i’m so happy to read about him again. Even if it was short and sweet - I needed him to have this.

I particularly loved to read Matthew and Sylvains relationship, they helped each other along while still solving the mystery. Ugh.. i wish it was longer I was having such a fun goofy time reading this!
Profile Image for Cheye.
62 reviews
May 11, 2026
Matthew has always held a special place in my heart im so glad Cassie gave us a happy story of him after all his heartache and guilt and struggle with addiction. Sylvain is so cute I’m so glad they found each other
Profile Image for Amy Portsmouth.
131 reviews18 followers
March 21, 2026
Love Matthew, this was very short and quick so I didn’t really connect much with the story! Still sad about Kit though :’)
Profile Image for Quique.
528 reviews
March 23, 2026
pues fíjate que pensé que el relato no me iba a dar marcha y sí me lo ha dado. gay shadowhunters siempre.
Displaying 1 - 30 of 220 reviews