One of life's few certainties: A serial-killer thriller narrated by a sock monkey is going to be good. Magician Penn Jillette's Teller-less novel is good, and occasionally great. Dickie is a worldly, wiseass sock monkey, owned by an NYPD diver dubbed Little Fool who's never quite grown up. One day, Little Fool finds his ex-girlfriend's corpse and turns PI. The plot is thin, but knowingly so; it's just a cage for Jillette's rabid little storyteller, who speaks in dense, pop-steeped paragraphs. Sock is a risky and raunchy ride that manages to be, of all things, a screed against faith, God, and imaginary friends. Jillette stumbles only with an overly blunt final twist. Novelists should never reveal their tricks.