 101 handy tech tips for the iPhone. You know how much Amazon took from every single book I sold? About 40%. From every book? From almost every – well, I mean, it was about – when you add everything up, it was the processing fees, all the stuff. Oh, my God. You basically get about – you basically just write 40% off of the price of that book. So you sell a book for $10. You're only making $6 on it.