So the photography nut on your gift list has asked for a stack of hardcover photo books by people with names like Lee Friedlander, Alfred Stieglitz and Annie Leibovitz. Don't know where to turn? Camera Obscura Gallery has plenty of fine art; in fact, the gallery and store claims to have the biggest selection of photography books in Colorado. Plus, they'll let you peruse the books before you buy them. Spend an afternoon there flipping through some of the best photos ever — then solve your gift-buying problems in a flash.