An absolutely amazing book. It took me a few chapters to get into it, but then I couldn't put it down. It's consistent to its own universe, and the narrator voice works really really well. The writing is amazing - during a suspenseful moment I literally got nervous myself and could feel butterflies in my stomach - it's not often that a book affects me that strongly.It's NOT a book to be read slowly and savoured - you won't be able to. I absolutely HAD to know what happened next, and stayed up far too late in order to finish it, as I simply couldn't put it down.The first half of the book takes place in Room, and in many ways reminded me of William Sleator's "Singularity" - finding routines and habits in order to keep sane in a universe that only measures 11'x11'.The second half is fascinating from a psychological point of view, and I found myself frustrated and charmed in turn by Jack and his Ma's reactions.An amazing read that cannot be recommended highly enough.