This is a weird but good book. The book begins on the 5th birthday of Jack. A boy who lives in Room with his Ma. Jack narrates the book by telling us all about the daily routines of Jack and Ma. Soon we realize that Jack and Ma are being held captive in Room although Jack knows nothing of this since he was born there. The story tells us how Ma came to be in the room, their lives within the room, their escape plan and their lives shortly after leaving Room to be Outside.
There is a great deal to this book that goes unsaid. Since Jack is only 5 he doesn't grasp much of what is going on. We can understand what has happened based on the very basic information we are given by Jack even if he doesn't. This is an interesting perspective on the relationship between a mother and her son and how she loses herself in becoming a mother while living in isolation then must find herself again when she re-enters the world but must still remain a mother.