Bob Pflugfelder

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...

"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...

"Hollywood has come to Half Moon Bay as kid inventors Nick and Tesla find themselves on the set of a big-budget superhero movie. But someone's sabotaging the on-screen debut of their favorite comic book hero, so the brother and sister sleuths must sneak behind the scenes to save the show. Luckily, they have help from an arsenal of homemade special-effects gadgets. This cinematic saga includes instructions for creating camera gear, stunt dummies, make-up...

"Super-smart kid inventors Nick and Tesla Holt have outsmarted crooks, spies, and kidnappers, but now it's time to crack their biggest mystery yet: where the heck are their parents? With the help of their eccentric Uncle Newt, the twins trace the clues to their missing Mom and Dad, scientists working on solar-power research for a clandestine government project. They'll need all their wits, along with an assortment of homemade gadgets, to outsmart...

An abandoned house at the end of the block. A mysterious girl in an upstairs window. A strange black SUV lurking around every corner. When Nick and Tesla Holt are sent to live with their eccentric Uncle Newt, they find their new neighborhood is full of secrets. What the heck is going on?

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.

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.