Having a genetically enhanced ability sounds great—until it happens. Henry Johnson has a best friend, a crush, a life-long enemy, and no idea his life is a science project. In sixth-grade, average may mean boring, but at least it also means avoiding freakdom. Henry is all kinds of average, but then other people’s thoughts start popping into his head. He thinks he’s going crazy before he discovers he’s one of several kids with genetically modified abilities, including the school bully. How did they get tweaked? To find out, Henry must brave family betrayal, his parent’s abduction by a greedy scientist, and even becoming frenemies with the bully. Can the Tweaks use their new abilities to thwart Dr. Grey’s plans to sell the gene-altering procedure to a foreign military?