I say that. When I started to read it (this Friday) I wake up at 1 o'clock in the morning and usually I go back to sleep if I wake up in the middle of the night but this time I opened the book and I kept reading for hours.
It's about a boy whose I.Q. is 68 and with an operation it gets 185 and more. And the way he is changing and he can understand things and his past and all his fights inside.
Incredible book.