Turn on all the lights and check under your bed. Things are about to get spooky in Trenton, New Jersey. Wulf Grimoire is a world wanderer and an opportunist who can kill without remorse and disappear like smoke. He's chosen Martin Munch, boy genius, as his new business partner, and he's chosen the Barrens as his new playground. Munch received his doctorate degree when he was twenty-two. He's now twenty four, and while his brain is large, his body is not. Anyone who says good things come in small packages hasn't met Munch. Bounty hunter Stephanie Plum has Munch on her most-wanted list. Usually she gets her man. This time she gets a monkey. She also gets a big guy named Diesel. Diesol pops in and out of Plum's life like birthday cake--delicious to look at and taste, not especially healthy as a steady diet. He's and uber bounty hunter with special skills when it comes to tracking men and pleasing women. He's after Grimoire, and now he's also after Munch. And if truth were told, he wouldn't mind setting Stephanie Plum in his crosshairs. Diesel and Plum hunt down Munch and Grimoire, following them into the Barrens, surviving cranberry bogs, the Jersey Devil, a hair-raising experience, sand in their underwear, and of course ... monkeys.