While many people use the terms
bookcases and bookshelves interchangeably, there is technically a difference between the two. Bookcases actually encase the items they store with a solid back. Because this makes them more structurally sound, they are often free-standing and can be easily moved around as needed. Bookshelves, on the other hand, are typically open on both sides and thus may need to be anchored to a wall before books or any other items are placed on them.