Why do you keep so many books (if you do)?

this is pretty much the reason why i have so little vinyl. freaks me out. feel like i need more stability for me n vinyl to happen.

I have kept a running list of every book I've read since January of 1992. Seriously! This may seem obsessive, but sometimes I'll think of something from a book but won't remember where it came from - or need to figure out a title or author - and it really helps.

(I also have a running list of books I want to read, but that is so out of hand that it should never be discussed.)