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 are bright 11-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. It’s not long before Nick and Tesla are embarking on adventures of their own—engineering all kinds of outrageous MacGyverish contraptions to save their skin: 9-volt burglar alarms, electromagnets, mobile tracking devices, and more. Readers are invited to join in the fun as each story contains instructions and blueprints for five different projects. In Nick and Tesla’s High-Voltage Danger Lab, we meet the characters and learn how to make everything from rocket launchers to soda-powered vehicles. Learning about science has never been so dangerous—or so much fun!

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 spy in their midst! Someone in the town of Half Moon Bay is spying on their Uncle Newt, an eccentric inventor. To uncover the true identity of this secret agent, Nick and Tesla must build their own spy gadgets, from burglar alarms and code wheels to a water balloon trap and more. Now in paperback, this third book in the popular Nick and Tesla series features laugh-out-loud jokes, fun illustrations, and five DIY science projects with step-by-step instructions for readers to try at home.

Einstein is running amok! Darwin is losing his head! The science museum in Half Moon Bay is in big trouble because its robotic replicas of history’s greatest scientists keep going kablooey! As 11-year-old amateur inventors Nick and Tesla Holt try to uncover the cause, they’ll need to keep adding all-new gadgets to their latest creation, a customized super-cyborg glove. Follow the action, and then follow the illustrated instructions to build your own gadget glove with four incredible functions: LED signal light, emergency alarm, sound recorder, and UV secret-message revealer!

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.

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 criminals—but 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 objects—and 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 mastermind—and foil his army of rampaging robots—before it's too late?

Complete with romance, action, comedy, and an army of shambling corpses, this prequel to the hit mash-up novel will have Jane Austen rolling in her grave—or crawling out of it! Four years before the events of Pride and Prejudice and Zombies, the Bennet sisters are enjoying a peaceful life in the English countryside, reading, gardening, and daydreaming about future husbands—until a funeral at the local parish goes strangely and horribly awry. Suddenly, corpses are springing from the soft earth—and only one family can stop them. As the bodies pile up, Elizabeth Bennet grows from a naive young teenager into a savage slayer of the undead. Along the way, two men vie for her affections: Master Hawksworth is the powerful warrior who trains her to kill, while thoughtful Dr. Keckilpenny seeks to conquer the walking dead using science instead of strength. Will either man win the prize of Elizabeth’s heart? Or will their hearts be feasted upon by hordes of marauding zombies?