Books and photos are reflections of our memories and thoughts that we can enjoy while we are alive, but are also able to leave for future generations to enjoy when we are gone.
Right now we have the most access to information and knowledge than ever before. If I want to know about the inverse square law, I can look at my phone and say "Ok Google, explain inverse square law to me" and BOOM, thousands of links come up. If I want to know about guide numbers, BOOM, Google strikes again and tells me. Not only can I know more, it costs LESS to even start in the game, because we have the best technology available than ever before, with an extremely low barrier to entry.