Can you keep a secret? It seems everyone who spends the summer at Camp Briarwood can. But what actually goes on inside this elite, top-secret summer camp for the most brilliant young minds? Plenty, if the whispers can be believed. Callie Garcia would do almost anything to see for herself. But the camp is invitation only. And that invitation depends on writing a strange exam that tests not only your scientific knowledge, but your character as well.Callie's not sure about her character, but she has her great-grandfather Theo's gift of a scientific mind. When her teacher accuses her of cheating, Callie believes her chance to go is lost ... until a different kind of invitation arrives. With it, Callie is thrown into a world of marvelous inventions and a perilous game of cat and mouse between inventors and frauds.