This book is a sequel to room 13, and I think it was amazing, it is a must read because the author creates age a simple but creepy story. I think this book is 8+ (7+ if you want, I think 8+) because some of the scenes and the idea of the story where the children hypnotized by the worm costume 's quite spooky and I don't think I would let a child under 8 read this book, personally.
I totally enjoyed this book because every page you had a question in your mind and you felt you had to turn the page to discover another weird happening. Personally, I preferred room 13 but I still think that inside the worm was equally as good, I just preferred the storyline off room 13 but I still loved the story of this, I just preferred the story line to room 13. This is definitely a must read on a kindle because it is just so gripping