Operation Do-Over
By Gordon KormanOperation Do-Over is a time-travel book written by Gordon Korman. Mason, the main character, is best friends with a guy named Ty, they would do everything together. They could not be separated until seventh grade when a girl named Ava came into the school. They fought over Ava, and their once great friendship came crashing down faster than it started. Since then, Mason has regretted having that fight, as Ty has hated him for years now.