In the back of the Dungeon Master's Guide is Appendix N. These are a series of books which Mr. Gygax felt everyone should read. There have been endless debates on which is best, but these discussions miss the point. They are educational books, ones that broaden the scope of one's own internal story.
I have created my own Appendix, N+ if you will. This will be an ever expanding list of books and hopefully fuel to do some book reviews. Somehow, I envisioned hawking books for Amazon or something, but I don't think so. If the book is important enough to warrant it, I will post links to DriveThruRPG and other smaller, niche vendors.