bookriot:

A funny thing about working at a used bookstore is that there is only so much control you have over your stock. You can select from what people bring in, but you can’t make more people bring you the books you want the most. Book buyers have to mentally calculate how many copies of this title we already have, how many we expect to sell, and what space we have for it. Sometimes a book piles up for years only to sell out in a week when a popular radio show mentions it.

But there are some books that stay constant. Some books, despite being published decades (or centuries!) ago, still can’t seem to stay on the shelves. This is a mix of a) sheer popularity and b) the delicate ratio of how copies go out the door vs how many books come in. Some books we sell in huge amounts, but we also buy stacks of, so it creates a perfect balance. Usually, it just doesn’t add up that way, and we either end up with too many or not enough. Here are 17 books that are inexplicably difficult to keep on the shelf.

http://bookriot.com/2016/08/15/17-books-that-sell-way-too-fast-at-used-bookstores/