Tip - Best Reusable Crates For Moving Books? — Good Questions

Q: I do a lot of moving, and I have a LOT of books (I'm an academic). Every time I pack them up, I use a ton of cardboard boxes, which get weakened and can't be used again. Any recommendations for crates/ cartons strong enough to move books, easy to carry (handles a plus), and can be stored in a small space?