Why get rid of stuff?
Today I did a small exercise and I got rid of 70 books - I now own 64 books (including text books which are professional reference texts).
Rationale: Will I ever read these books again? They're heavy. They take up space. And, if I'm desperate to read them again, there is always the library - or a Kindle. I used to have books to ensure people would think I'm smart and then those people would say "Wow, you're sooo smart. I can see you read so much." Well truth is, I'm actually illiterate and I bought books to fool people. If people think I'm smart because I have a bunch of books well, they think too much. People will know I'm smart if I actually am smart. And if they think I'm smart, even though I'm not smart, then they're not smart for knowing I'm not smart. Duh.
Do it. Get rid of your extra books. Face up to the fact that you're not going to read them again. Trust me, you're smart. You don't need a massive bookshelf validating you.