Nick and Tesla's high-voltage danger lab : a mystery with electromagnets, burglar alarms, and other gadgets you can build yourself / by "Science Bob" Pflugfelder and Steve Hockensmith ; illustrations by Scott Garrett.
Nick and Tesla are bright 12-year-old siblings with a knack for science, electronics, and getting into trouble. When their parents mysteriously vanish, they're sent to live with their Uncle Newt, a brilliant inventor who engineers top-secret gadgets for a classified government agency.