For readers of Gillian Flynn and Tana French comes one of the decade's most anticipated debuts, to be published in thirty-six languages around the world and already in development as a major film from Fox: a twisty, powerful Hitchcockian thriller about an agoraphobic woman who believes she witnessed a crime in a neighboring house.It isn't paranoia if it's really happening . . .Anna Fox lives alone--a recluse in her New York City home, unable to venture outside. She spends her day drinking wine (maybe too much), watching old movies, recalling happier times . . . and spying on her neighbors.Then the Russells move into the house across the way: a father, mother, their teenaged son. The perfect family. But when Anna, gazing out her window one night, sees something she shouldn't, her world begins to crumble--and its shocking secrets are laid bare.