You may notice that on the side column I have added two lists.
Now, every self-respecting author will tell you that to be a good writer you must also be an avid reader. So these lists are some my personal recommendations. You will note that many are not in my writing genre - life wouldn't be too interesting if you stuck to the one predilection.
Hope you check them out - they are all deserving of your time (well, some of the non-fiction is more specific).