That was me until a few months ago. I have learnt that just have like all sentimental clutter that the memories are in my head and not in the item. The joy of reading is not retained in the physical book, it is in my head, my imagination. So I no longer greedily hoard my books, except for a very few, I now set them free. I donate to charity book fairs, or give to friends, and it makes me feel so happy to know that someone else might have the opportunity to enjoy a wonderful book.
Let’s be honest, how many of us reread our books? Set them free.