If there was any way to sue for publishing a book that is a complete lie from start to finish, this guy should be sued.I have never seen such a worthless book that advertises itself as the best secret on earth for learning calculus. I have been out of school for a number of years and bought this book based on its lies on the cover and introduction to brush up on calculus. It is now worth nothing more to me than firewood. The guy that wrote it must be a teacher in a leading university somewhere that has never had a job doing anything but boring students stupid.I can not begin to tell you how upset I am that I spent 1 dime on this book. It will make you more upset that you spent the time to read the introduction. You won't make it past chapter one before tosing it!!! Steven Krantz, go beary your head in the sand dude!!! Thats were it was when you wrote this piece of crap!!!