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?