Masterminds

While I recommend Masterminds, I cannot recommend the audiobook. Each chapter shifts perspectives between the kids and the audiobook uses different readers for each. Most are good but one reads dialog for the female characters with a really annoying voice. The other readers read the girls normally so it's inconsistent and annoying.

The book doesn't end in a cliffhanger but it's definitely not a satisfying conclusion. Have book 2 ready.