Bruce Coville 
My Teacher Fried My Brains 

Brains are sizzling in the seventh grade… The first day of seventh grade is probably the worst day of Duncan Dougals life. He knows that things are really bad when he finds an aliens hand in a Dumpster and then gets plugged into an alien brain fryer! Can Duncan find out which of the four new teachers in his school is an alien before his brains get fried to a pulpor before the aliens try to fry the whole planet?