I just had a moment where I downsized my RPG book collection. Do you ever weed out your collection? I find myself becoming a bit of a headless chicken, sometimes more interested in what the promise is that a book might hold, rather than diving in deep into the ones I already have. This superficial engagement with many books I find very unsatisfying. The books I cherish most are the ones that I have really sunk my teeth into, and I have a feeling that there is still a lot to discover in some of those that I haven't revisited in a while. Master the tools you have, rather than acquiring ever more barely used tools. Just wanted to air my thoughts, quite happy right now with my smaller collection of things I really cherish.
I've almost certainly go too many books, but for me RPG books are two things:
Something I do or plan to use the actual contents of. Whether that be rules, tools, or adventures.
Physical objects that are nice to look at and hold.
Happily the indie RPG scene is very good at making books that cover both of those categies. I will once in a while go through the collection and give away books that I both don't think I'll ever use, and also aren't nice enough as objects to be worth keeping around.
I also have a number of magazine bins filled with zines, which I love but also desperately needs to be pared down.
Also because I will take any opportunity to share a shelfie:
Desk RPG shelf of "close to hand" stuff (and also tall books because they don't fit on the other shelves).