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In order to figure out why robotic versions of history's greatest scientists and inventors keep going haywire, eleven-year-old twins Nick and Tesla create a gadget glove.

"A mystery with gadgets you can build yourself."

Eleven-year-old twins Nick and Tesla are living with their eccentric inventor uncle when they decide to investigate the series of robberies that have taken place. Includes instructions for do-it-yourself science projects for children.

Originally published: Philadelphia: Quirk Books, 2013.

After foiling a gang of kidnappers and fending off an army of robots, 11-year-old siblings Nick and Tesla Holt could use a little rest! But as their third mystery opens, they discover there's a spy in their midst, searching for secrets in the home of their beloved (and slightly crazy) Uncle Newt. Is it the new laboratory assistant? The exterminator? The housekeepers? Or someone completely unexpected? To expose the mystery agent, Nick and Tesla must engineer all kinds of outrageous contraptions, from code wheels and fingerprint powder to spy cameras and burglar detectors. Best of all, instructions are included throughout the story, so you can build the projects, too!

Nick and Tesla return in an all-new, robot-filled adventure! When a rash of robberies hits the town of Half Moon Bay, 11-year-old sleuths Nick and Tesla are determined to catch the criminalsbut to do so, they'll have to build a host of new gadgets and gizmos! In this robot-themed follow-up to Nick and Tesla's High-Voltage Danger Lab, the brother-and-sister duo build four different droids out of ordinary household objectsand illustrated instructions are included throughout the story, so you can build them, too! Make bristlebots that buzz, hoverbots that float above the ground, battlebots that duke it out, and more! Can Nick and Tesla catch the criminal mastermindand foil his army of rampaging robotsbefore it's too late?

Kid inventors Nick and Tesla Holt have outsmarted crooks, spies, and kidnappers. Now they have to crack their biggest mystery yet: Where the heck are their parents? To outwit the criminal mastermind who's holding their parents hostage, the twins will need all their brainpower, the help of their eccentric Uncle Newt, and an assortment of homemade solar gadgets. Will the Holt family be reunited at last? Or will a hijacked solar satellite beam down doom from the skies? The adventure includes instructions for creating a solar-powered hot-dog cooker, alarm, secret listening device, and model car, plus a nighttime signal cannon that fires illuminated ping-pong balls.