"There's something in Jenny's armpit, and it's getting bigger. Ten-year-old Jenny Kim and her two buddies, Fen Stenson and Barker Mifflin, live in the town of Nevermind, where strange happenings are so normal that finding a mysterious thing growing in your armpit isn't even considered a big deal. But when the mysterious thing gets so big Jenny has to haul it around in a wheelbarrow, it's cause for concern. She's going to need some help sorting this...