Restart

This book review is about a book called Restart by Gordon Korman. 
Restart is about a boy named Chase. Chase used to be a trouble maker but after he fell off his roof he loses everything. He doesn't remember anything. As the weeks go on he starts finding out more and more stuff about what he did. Eventually he becomes friends with the sister of the person he used to bully. Will Chase be able to make everyone believe he is a nice person now?
I recommend this book to 3rd graders and up.