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

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 myste

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’r

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 c

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 pare