Deathwish by Rob Thurman is the fourth book to the Cal and Niko Leandros series following Nightlife, Moonshine, and Madhouse. Half-human Cal and Niko Leandros, the main characters in the series, continue their agency of mythical beings with new problems in New York City. The brothers are yet again faced with the threat of their monster heritage, the Auphe (elf family), who are blood thirsty for revenge. Worse still, is the mystery surrounding their newest client, a vampire named Seamus who was killed before the brothers could find out the identity of Seamus' stalker. This story, along with the past books, is filled with a mysterious urban fantasy filled with twists.