Bob Pflugfelder

Uncover a secret agent and build spy gadgets with twin sleuths Nick and Tesla in this zany, action-packed middle grade adventure by "Science Bob" Pflugfelder! After rescuing a kidnapped heiress and taking down a robot army, 11-year-old twins Nick and Tesla could really use a break. But before they can kick back and relax, the young sleuths discover there's a...

Build a super-cyborg gadget glove and save the science museum with twin sleuths Nick and Tesla in this zany, action-packed middle grade adventure by "Science Bob" Pflugfelder! Just like their eccentric genius Uncle Newt, 11-year-old twins Nick and Tesla love science—and they can't wait for the grand reopening of the science museum in Half Moon Bay. But when someone sabotages...

Another fast-paced mystery in the popular Nick and Tesla series, featuring a new case to crack and all-new gadgets that kids can build themselves! 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,...