Amazon made a small change to the way it sells books. Publishers are terrified.

Constance Grady:

It used to be that when you were shopping for a new copy of a book and clicked “Add to Cart,” you were buying the book from Amazon itself. Amazon, in turn, had bought the book from its publisher or its publisher’s wholesalers, just like if you went to any other bookstore selling new copies of books. There was a clear supply chain that sent your money directly into the pockets of the people who wrote and published the book you were buying.

But now, reports the Huffington Post, that’s no longer the default scenario. Now you might be buying the book from Amazon, or you might be buying it from a third-party seller. And there’s no guarantee that if the latter is true, said third-party seller bought the book from the publisher. In fact, it’s most likely they didn’t.