"The Hitman's Guide to Housecleaning" is a novel by Marko Kloos that blends dark humor with crime fiction. The story follows Teddy, a hitman who is forced to abandon his life of crime and take on the mundane task of housecleaning after a botched job. As Teddy navigates his new life, he encounters various challenges and quirky characters, all while trying to maintain his cover. The book explores themes of redemption and the absurdity of everyday life, making it a unique take on the hitman genre.