Nick and Tesla's super-cyborg gadget glove

With the mystery of the spy's identity solved, the kids face a whole new crop of questions about their parents' mysterious disappearance. To unravel the mystery, they'll have to come up with all-new cyborg gadgets together with their zany scientist Uncle Newt and their friends Silas and DeMarco. Nick and Tesla create a gadget glove to figure out why robotic versions of history's greatest scientists and inventors keep going haywire. Book #4