While I'm a fan of having an actual book in-hand, I also greatly appreciate having digital versions of books. I use pdf rulebooks all the time. And Paizo is looking to digitize some of their back catalog. In this post, they update us about how that's coming along.
From the article:
Greetings, Pathfinders! As we come to the end of January, we wanted to provide an update on the status of our digitization efforts. There’s some exciting news below, in addition to some general information, so read on!