This is my personal version of the Appendix N "Inspirational Reading" list from the AD&D Dungeon Master's Guide, Appendix N. (I'm using the 1983 edition.)
By personal version I mean those works that to me seem a good starting point, as well as representing an attempt at a practical delimitation of a list that is pretty open-ended.—For the original Appendix N lists not only specific works, but in addition the names of many authors, some of which wrote in multiple genres. Including the entire bibliography of those authors would probably be overkill.