Which is the Best PMP Book?
This is very hard to say because it is a matter of taste. First of all, the book you choose has to support your learning style. Are you more of a visual learner? Or do you prefer a more scientific approach and so on ...
And second of all, you also have to like the way it is written.
The good news here is that we can safely say this: No matter which PMP exam prep book you choose it will take you to the exam. This is because all of the popular books have been around for several years. They are in their 4th, 5th, or even 10th edition and have been refined over many years. The authors include and explain the concepts you need.
So I recommend that you go to your local bookstore or library and leaf through the available guides. Or -- if you prefer -- use the "look inside" feature offered by Amazon. This will give you an idea of what the book is like and if it will work for you.
For further information and my recommendations you might refer to this article here (just click on the image to get there):