I have my books ordered for summer reading, and I expect the first of the bunch to arrive today. Here are the titles, each linked to Amazon so you can read a description. You'll notice a common thread tying all of them together. I'll start to post reviews in a few weeks.
The Practice of Contemplative Photography: Seeing the World with Fresh Eyes
Why Photographs Work: 52 Great Images Who Made Them, What Makes Them Special and Why
The Photographer's Eye: Composition and Design for Better Digital Photos
The Photographer's Mind: Creative Thinking for Better Digital Photos