Bad Monkeys

Jane Charlotte has been arrested for murder.
She tells police that she is a member of a secret organization devoted to fighting evil; her division is called the Department for the Final Disposition of Irredeemable Persons, Bad Monkeys for short.
This confession earns Jane a trip to the jail's psychiatric wing, where a doctor attempts to determine whether she is lying, crazy, or playing a different game altogether. What follows is one of the most clever and gripping novels you'll ever read.