2.5 stars. 
 This book was fairly underwhelming. Although it was certainly unique and definitely very powerful at times, I spent a pretty large part of it bored and annoyed. 
 To start, the beginning was PAINFULLY slow. I was really close to DNFing this after I made it through more than a quarter of the book and absolutely nothing interesting had happened, but I managed to skim ahead to the interesting parts. There were very few of these, and I'll list them in the spoiler tag: (view spoiler)[Jack's escape from Room, the TV interview Ma gave, and the final scene of the two of them revisiting Room one last time. (hide spoiler)] These were the only moments when I genuinely felt connected to the emotions of the characters. 
 On top of feeling bored, I was really annoyed by the voice. I can appreciate the choice the author made with the perspective she used to tell this story, but Jack's voice was just SO incredibly irritating. I could maybe deal with it if this was a short story or even a novella, but I really didn't enjoy reading 400 pages of the rambling thoughts of a five-year-old. It's not that I disliked Jack himself, he seemed like a sweet kid and his journey was interesting, but I lowkey hated reading his POV. 
 This was an interesting idea for a story, but the way it was told just didn't work for me.