Quote Originally Posted by jjphoto View Post
TBH, available light photography is simply photography. Books like 'The Negative' are a good start but understanding your camera, your lenses, your meters and films are integral to getting accurate exposures. Understanding principals or rules will only get you so far. Testing your gear and learning how it responds to light/meter readings is very important.
...which is exactly why The Negative is a good place to start. Also, Natural Light Photography (#4 in the Basic Photo Series), by Adams.