New York Times Best-seller, now a major motion picture. Anna Fox lives alone--a recluse in her New York City home, unable to venture outside. She spends her days drinking wine, watching old movies, recalling happier times...and spying on her neighbors. Then the Russell move into the house across the way: a father, a mother, their teenage 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. What is real? What is imagined? Who is in danger? Who is in control? In this diabolical gripping thriller, no one--and nothing--is what it seems.