Counselors at Camp Fielding sneak into the campers’ bunks at night and inject them with something while they sleep. Pretty soon, the kids turn into hyperintelligent drones, and soon after that, they start puking feathers. Eventually, the kids disappear. While the plot itself isn’t terribly original – Jenna and Lucas are two intrepid campers who refuse to rest until they determine what is causing their friends to get sick – it’s done well, and the major reveal isn’t wholly expected.
The School Library Journal review of Brain Camp mentioned that the book’s target audience was unclear, since the summer camp setting seemed aimed at tweens and young teens while there’s a couple of sexual references that make it more appropriate for older teens. I disagree – I don’t think older teens will have a problem getting interested in the story, especially since a lot of it deals with parent/child strife, and I don’t think younger teens and tweens will be really put off by the couple of more mature scenes (scenes which are all about puberty). They’re quick and might even be passed over by kids too young to understand them.