I’ve mainly shifted over to digital books for my RPG needs. I was an early adopter of eBooks – I had an electronic ink eReader before the Kindle was a thing. So shifting over to PDF form game books was a natural extension, except for that one company that just doesn’t want to publish in that format. However, I still hung onto a limited selection of books (mostly from that one company), both for my own use and for the household’s Junior Gamers #1 and 2. Some of these date back to my 1st edition D&D days before and during college.