Madhouse is a novel by Rob Thurman

Rob Thurman

Robyn Thurman, writing under the name Rob Thurman, is the author of the Cal Leandros Series of six novels: Nightlife, Moonshine, Madhouse, Deathwish, Roadkill, and Blackout...

, the third in her Cal Leandros Series, after Nightlife

Nightlife (novel)

Nightlife is the debut novel from author Rob Thurman . It is an urban fantasy novel focused around Caliban Leandros and his older brother Niko as they roam around New York City trying to stay alive and keep Cal's dark lineage a secret...

 and Moonshine

Moonshine (novel)

Moonshine is the second fantasy novel by Rob Thurman, and the second in her series featuring the monster hunter/private investigator Cal Leandros.-Plot summary:Moonshine is the sequel to Nightlife...

. Its plot centers around the vicious Sawney Beane, who has mysteriously come back from the dead, and is killing innocent New Yorkers. This book is notable in that is introduces several new characters, including Ishiah the Peri

Peri

In Persian mythology, which constitutes the mythology of not just Persians but all Iranian peoples, peris are descended from fallen angels who have been denied paradise until they have done penance. In earlier sources they are described as agents of evil; later, they are benevolent...

, Delilah

Delilah

Delilah appears only in the Hebrew bible Book of Judges 16, where she is the "woman in the valley of Sorek" whom Samson loved, and who was his downfall...

 the Werewolf

Werewolf

A werewolf, also known as a lycanthrope , is a mythological or folkloric human with the ability to shapeshift into a wolf or an anthropomorphic wolf-like creature, either purposely or after being placed under a curse...

 and Wahanket the Mummy

Mummy

A mummy is a body, human or animal, whose skin and organs have been preserved by either intentional or incidental exposure to chemicals, extreme coldness , very low humidity, or lack of air when bodies are submerged in bogs, so that the recovered body will not decay further if kept in cool and dry...

, on top of its usual cast.