Went to my local library and snooped around the photography section the other day. As I have a library of about 60 photography books at home, I wasn't expecting to find much. I was wrong. Picked up "Landscape", by the Library of World Photography. It's just excellent, presenting a collection of great landscape photography from the early 1800s to present. I had seen most of the 20th century photos already, but my mind was blown wide open by the quality of earlier work presented in the book -- most of it being mid-1800s albumen prints. About halfway through the book I put it down, turned to my wife and said, "how can something make you so happy and simultaneously so very depressed?" I may not pick it up for a few days, lest I give up trying altogether.