I read this book really quickly! It was definitely hard to put down, but as I got closer to the end, I kind of started to lose a little bit of interest, unfortunately. I enjoyed probably the first 90% of the book very much. It's a great premise - a mother allows her 12-year-old boy to go to a sleepover with friends, and the next day he's nowhere to be found. I liked the slow burn of finding out the background of some of the characters. But I think it started to lose me when the mother found out something very important, and then inexplicably neglected to tell anyone. It didn't make a lot of sense. I also thought the ending was a bit too convoluted and “twisty”. Overall, I did enjoy most of it, but I would have appreciated a better ending.