>>3513873'The Negative' by Ansell Adams. Great examples of the zone system, and once you understand exposure as a series of bright and dark zones, it will help you make better digital and analog photographs. Plus, it's interesting photography history.
I also recommend The Documentary Impulse by Stuart Franklin. Interesting commentary on journalism and photography, but I also think it's relevant in the age of internet photography, where people tend to capture images like trading cards, as opposed to their photography actually having value to them.
