NATIONAL BESTSELLER - "A fun, DaVinci Code-style blend of puzzles, mysticism and high-octane action" (People, Best Books of the Month), from the author of The Puzzle Master "This rip-roaring adventure thriller is an escapist puzzle box of delights: a neurodivergent hero, an unsolvable mystery, and death hanging over every move."--Catherine Steadman, author of Something in the Water
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