The undercover book list
(Book)

Between her father's posting overseas and her best friend Sienna's move to the other side of the country, seventh grade is looking lonely for Jane MacDonald. But Sienna has left her with one last trick: a hidden message in a library book―the perfect plot to start a secret club and find Jane a new book-loving friend. Tyson Flamand has problems of his own. Since the fourth grade he's had a reputation as a bad kid, and there's no point fighting it when teachers always think the worst. So when he finds an anonymous note in the library looking for a nerdy new friend, he knows he's the last person in the world it could be meant for. But something makes him answer it anyway, and Tyson finds himself pulled into a secret book club where being hidden may be the first step to being truly seen. --from Amazon.