An eye-opening book for many programmers

Here is an unusual book that has been an eye-opener for many programmers. For some, it may look obvious. But many programmers changed their “lifestyle” in programming after reading this book. In that sense, this is a book on programming philosophy. I recommend that you glance through the “Look inside” features to see the contents. May be, you are already familiar with those concepts. In that case, you can skip it.