An instant New York Times bestseller, Liar & Spy is a story about games and friendship. Seventh-grader Georges moves into a Brooklyn apartment building and meets Safer, a twelve-year-old self-appointed spy. Georges becomes Safer's first spy recruit. His assignment? Tracking the mysterious Mr. X, who lives in the apartment upstairs. But as Safer becomes more demanding, Georges starts to wonder: How far is too far to go for your only friend?