While some experts say bookshelves are open (like the Vlsrka Industrial Bookshelf, one of our top picks) and bookcases have a back and sides, other experts tell us the terms are interchangeable.
If you have an awkward skinny spot in your bathroom then these Ikea Godmorgon units might be a perfect fit. If you have more room, you could use the Billy bookcase in the bathroom. I love this version ...