This was a solid and sweet conclusion (or what used to be the conclusion now that Riddle of Ages exists) to a really great middle grade series. While the first Mysterious Benedict Book is by far the best and most exciting--it's the only one that really felt high-stakes and there's just something inherently thrilling in kids working as spies trying to uncover a nefarious plot in a sinister setting, not to mention seeing the kids' friendship form--Prisoner's Dilemma is more than satisfying as a conclusion.

The characters in this series are all fantastic, and it's in the dynamic between the children where the book really shines. It was such a delight to revisit these books and I'm excited to see where the newly released fourth book takes me.