I definitely judge a book on how fast I figure out the plot or the twists or the ending. This one truly kept me guessing until the end. It is very well done indeed and well written. It wasn't boring to me at any point and I didn't think there were useless parts. It was captivating and thrilling. I quite enjoyed the perspective of Theo and the professional side of a psychiatric facility. That was not boring either as it showed an interesting side of things. I had high expectations for this book after all the hype hearing about it a lot and I feel like it met my expectations. The hype is definitely not wrong about this one. I cannot wait to read more from this author and the potential movie that comes from this fantastic book!