My sibling suggested this book to me as it is pretty short. 

It was definitely short. I am still working on my language level English, so there were some parts that were hard for me to get through. I would almost say the first half of the book is a bit boring. But the end is in my opinion definitely a great ending. The second half was great and I could really feel the curiosity and adrenaline run through my body. I remember being weirded out at the end (not sure if it was in a bad way or not). 

If you're thinking of reading this, I would definitely give it a shot. It's fun to have read..