J.D. is the fourteen-year-old son of the notorious monster of Frankenstein, on a quest to find his family . . . the donors of his dad's parts. In New York City J.D. discovers a cousin, Bertie, who is extremely rich and likes sitting on his butt and doing nothing all day. Speaking of butts, that's how J.D. is related to Bertie – through Frankenstein's monster's butt! Now Bertie is in danger. Fran is desperate to get her hands on a cousin and has enlisted the help of the Werewolf and the Invisible Man! But can J.D. convince the slacker Bertie that he really is related to an adventurer like J.D. and that the threat is genuine? Readers will be swept up in the story's use of maps, diary entries, and mixed media images as J.D. and Bertie go on the run through the streets of the Big Apple.