Liar and Spy

The instant New York Times bestseller from the author of the Newbery Medal winner When You Reach Me: a story about spies, games, and friendship.
 
The first day Georges (the S is silent) moves into a new Brooklyn apartment, he sees a sign taped to a door in the basement: SPY CLUB MEETING—TODAY!
 
That’s how he meets his twelve-year-old neigh­bor Safer. He and Georges quickly become allies—and fellow spies. Their assignment? Tracking the mysterious Mr. X, who …