This specific ISBN edition is currently not available.View all copies of this ISBN edition:
Danny knows the Professor is working on a new secret invention and is in danger, and when he and Professor accidentally switch on the new machine, problems get larger.
"synopsis" may belong to another edition of this title.
Book Description Simon Pulse, 1979. Paperback. Condition: New. Never used!. Seller Inventory # P110671443836
Book Description Simon Pulse, 1979. Paperback. Condition: New. Seller Inventory # DADAX0671443836