I just read "Understanding Exposure (Revised Edition)" by Bryan Peterson. This book really helped me understand the complexities of exposure and several other issues for the beginning photographer. The book was recommended by several users on this website and it turned out to be a real winner. I dropped a lot of hard earned money on good camera package and I plan to use it for years. My main hobby is hiking the Sierra's and I now get to add photography - a perfect combination for me. With all that being said, what are some other books that can add some value to my knowledge base?