The whole gang is back for another adventure! Reynie, Sticky, Kate, and Constance are a little older now, contemplating their next move into adulthood, and worried that the Society will lose their special connection as they grow up. They band together one last time to stop the evil Mr. Curtain from escaping from his high-security prison.

I love everything about this book! The character development is excellent, and the friendships within the Society are just perfection. The plot kept me guessing right up to the end, and I was surprised at every turn. I love the witty writing style, and all the puzzles and codes and conundrums that are solved as the team work together to save the day!