2 sound discs (2 hr., 30 min.) : digital ; 4 3/4 in.
"With tracks every 3-6 minutes for easy book marking"--Container.
Narrated by Johnny Heller.
Eleven-year-old Vincent Shadow, inspired by the ideas of the inventor Nikola Tesla, has always kept his many unusual toy inventions secret from his family until he enters a contest whose prize is to spend a summer working with the eccentric Howard G. Whizz of Whizzer Toys.