A few that DS liked that haven't been mentioned -
Frank Asch's Cardboard Genius series comprised of the following 3 titles:
Star Jumper, Gravity Buster, Time Twister

One he could not put down recently:
Science Fair by Dave Barry and Ridley Pearson
This book deals with a conspiracy at a gifted school regarding science fair projects and the lengths crazy parents go to ensure that their children succeed.

Last edited by momx2; 07/29/09 07:04 PM. Reason: grammar typo