Something weird is going on! Mr. Docker must be a mad scientist. He does nutty experiments, and he has an evil, demented, cackling laugh. Plus he invented a car that runs on potatoes! Mr. Docker is the weirdest science teacher ever! Is he trying to take over the world? Ages 7 to 10.
 
NOTE: This title is a Bargain Book Copy, and it may have a small dot or line on the edge of the book.