26-year-old Clayton was raised by a commune of elderly puzzle experts and enthusiasts after being left in a hatbox on their doorstep as a baby. When his adoptive mother, Pippa, passes away, she leaves behind cryptic clues he hopes will lead to an understanding of his past. Dual POVs reveal Pippa’s founding of the commune, and the novel is interspersed with actual puzzles to solve! I really liked both narratives in this novel; Pippa and Clayton were both loveable, as were all the side characters. I only cracked about half the puzzles, and they did slow my reading down a lot. But a GREAT concept that I think was well executed.