The various Ansel Adams books on photographic technique published over several decades were great for the technically inclined photographer. Other photographers did well enough merely by exposing for the shadows and developing for the highlights. Mystically inclined photographers may even have been inspired by Minor White's Zone System Manual. For the 21st century, Way Beyond Monochrome by Ralph Lambrecht and Chris Woodhouse may be expensive, but certainly worth it. You can sample some of it at http://www.waybeyondmonochrome.com/.