Actually, my experience is quite different when it comes to choosing books to read. I have read probably close to 100+ books on self-help, hypnosis, subconscious mind, psychology and so on. But maybe only 5% of these books, I actually went out looking for. Every other book came to me by accident or you can say I was sort of directed to them. E.g. I used to read a lot of bodybuilding books especially about and by Arnold Schwarzenegger and that's where I learned about self development, and once in the bodybuilding section, I found a book on hypnosis, and then got reading those books, then just happened to find a book by Anthony Robbins and so on. A lot of the times I just get an urge to go to Chapters or Indigo bookstore and once I go there, there's usually an awesome book on sale about a topic that I have been reading about.
Intention - Manifestation.
I actually just started thinking about all this after reading this post and I can't help but be amazed by this whole process.
But the best place to probably start is this:
PsiTek - FREE Metaphysical Books
They have tons of great and classic books online for free. Again, I got this web site by pure chance. :-)
I have also read quite a few biographies which I find really motivating.
Another good place to get free books is:
Main Page - Gutenberg
Besides that, you might want to read the books that are written by the people who're in the movie "The Secret".
No book collection is complete without "Think and grow rich" which can actually be found on the first site I mentioned above.
Enjoy.