You have probably hit upon the core of the disagreement: when I buy a book, I want to keep it and I will refer to it in the future. Books that aren't keepers, I

You have probably hit upon the core of the disagreement: when I buy a book, I want to keep it and I will refer to it in the future. Books that aren't keepers, I will borrow from the library. I don't read much fiction but the stuff that I like (e.g. Hitchhiker's Guide to the Galaxy), I want to be able to access easily without being subject to encumbrances.