BIG + for the Freeman book, The Photographer's Eye
. Very interesting, relevant examples and concise (though a little sparse) text. Well worth it and very valuable information. My shooting style is slow to change, so what this book has done for me is that it has made me a much better editor of my own work. After shooting, I am much more decisive on what shot to work on and what shots to forget, and more importantly, I know why.
Another recommendation is Perception and Imaging: Photography - A Way of Seeing by Richard Zakia.
This it a little bit more scholarly than the Freeman book, delving more into perception, how we see, how the brain interprets and makes sense of what we see, and how to use that to create better photographs. (4 stars on Amazon, but clearly not for everyone, Eleven 5's, Two 2's and Two 1's - personally, I am in the same camp as the Eleven.)