I typically buy my books either second hand or from a discount site like Book Outlet unless it’s something I really want to read and I can’t find it elsewhere. I like having a physical bookshelf full of all my favorites to look at and reread if I want to and if I didn’t love a book I donate it or give it to a friend I think might like it more. Reading is probably my main hobby so I don’t mind investing the money into buying books.