A Sea Change

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.