The Mysterious Benedict Society and the Prisoner's Dilemma by: Trenton Lee Stewart

The Mysterious Benedict Society and the Prisoner's Dilemma (2009) by Trenton Lee Stewart is the third installment in the acclaimed middle-grade series that blends mystery, intellect, and heart. This book continues the adventures of Reynie, Kate, Sticky, and Constance as they confront new challenges and deepen their bonds.