Utterly unputdownable. The tension at one point had my heart racing and my stomach in knots. I'll repeat what Audrey Niffenegger said on the back: "Emma Donoghue's writing is superb alchemy, changing innocence into horror and horror into tenderness. Room is a book to read in one sitting. When it's over you look up: the world looks the same but you are somehow different and that feeling lingers for days."