The Essential Writer's Reference Library

No matter what stage you are in your writing career, having a carefully curated reference library is invaluable. I've included the best books on writing, encompassing learning, inspiration, and encouragement, the three pillars of a solid approach to your craft. While some links are affiliate links, you never pay more for any service just because I recommend it.
In fact, sometimes you'll pay less, since some discounts are offered only through affiliates.