Bellairs, John. The eyes of the killer robot

Bellairs, John. The eyes of the killer robot. Penguin, 1986 [0-14-130062-0]
In another Johnny Dixon mystery, Johnny does not at first believe the story of his friend Professor Childermass about the insane inventor who invented an evil baseball-pitching robot. But soon Johnny keeps seeing things and the Professor wants to find the original robot so they are off on an adventure looking for robot. Of course they find the old robot and put it together. Little did they know when they inserted the robot's eyes, it would start an evil chain of events. This 167 page book is an upper elementary suspense story, not as "evil" as some of his other books.