Science Bob Pflugfelder, Steve Hockensmith Sort By Default Title - A to Z Title - Z to A Price - lowest first Price - highest first Time Added - latest first Popularity - most popular first Sales - best selling first Nick and Tesla's High-Voltage Danger Lab: A Mystery with Electromagnets, Burglar Alarms, and Other Gadgets You Can Build Yourself (Unabridged) $19.99 $13.99 Nick and Tesla's Robot Army Rampage: A Mystery with Hoverbots, Bristlebots, and Other Robots You Can Build Yourself (Unabridged) $19.99 $13.99