"In this wonderful young adult adventure, a socially maladroit teenager invents a way to become a time-slicing superhero and uses his new powers to extract an exquisite revenge on his junior high school tormentor—and in the process learns a few lessons for himself as well. This hilarious tale is a delicious evocation of adolescent geekery. Don't miss this one! Written by the Hugo and Nebula award winning author of ""The Martian Child,"" ""The Man Who Folded Himself,"" ""The War Against The Chtorr"", and ""The Trouble With Tribbles"". "