George and Harold, and their doubles, Yesterday George and Yesterday Harold, have a good thing going. Two of them go to school, while the other two hide in the tree house and play video games all day-then they switch! But when their malicious gym teacher, Mr Meaner, creates a method of mind control that turns their fellow students into attentive, obedient, perfect children, the future of all humanity will be in their hands!

Ten-year-old Nort McKrakken is a pint-sized computer genius and madcap inventor. Fourteen-year-old Chip Munson is his best friend and loyal guinea pig. When Nort creates C.H.I.P.--a microsized computer thingy--and sticks it on his best friend's tooth, it turns Chip into a real-life secret agent. With Chip's C.H.I.P. and Nort's brain, the pair is ready for anything... even middle school. In the first My Best Friend Is a Secret Agent book, Nort and...

The campaign to save the earth from being turned off is going well, but Michael K. must enlist fellow fifth-graders Venus and TJ to help hide the SPHDZ from Agent Umber, especially when they become involved in a school play.