Thought-Provoking Books

I read many non-fiction books, but recently noticed that only a few qualify as truly heavy, thought-provoking reads, that you literally can't finish it in a manageable time because you keep telling yourself, "Wait a minute," then stop to Google something, run an experiment, or just think deeply. My current example (still unfinished) is "Moonwalking with Einstein" by Joshua Foer. It's mind-blowing - the entire memory universe around us that I never properly explored before.