«“Korman brings smart plotting to an absorbing time travel narrative that examines the long-term impact of actions….Given [the] opportunity for a do-over, [Mason] seeks to right wrongs as well as try new things, leading to a climax in which both he and readers see what, if anything, has changed. Full of warmth and middle-grade humor." — Publishers Weekly “Watching Mason learn from mistakes and explore new aspects of himself (especially with a 17-year-old consciousness trapped in a preteen body) is vicariously satisfying, and the sheer fascination of his predicament will keep readers turning pages, anxious to find out if he succeeds.” — Kirkus Reviews "Korman’s signature blend of comedy, drama, and middle grade angst will leave readers with a warm fuzzy feeling.” — Bulletin of the Center for Children’s Books “Just plain fun from start to finish, this story will appeal to Korman’s many fans and others who enjoy humorous fiction.” — School Library Journal “A rewarding time-slip story.” — Booklist “Korman brings his usual humor and heart to this well-plotted mystery… that sensitively explores themes of friendship and family.”  — Publishers Weekly»