As my colleague Laura Owen has reported, Authors United — a group of writers who are upset at the tactics Amazon is using to negotiate with the French publisher Hachette — has posted a letter to the company’s board of directors, arguing that the online retailer is being unfair to authors. Among other things, the group says Amazon is making a mistake by treating books like any other consumer product.

In fact, in a somewhat bizarre turn of events for a group that is supposedly protesting Amazon’s methods — the refusal to allow advance orders of Hachette books, the removal of some books from the search index, and so on — Authors United makes an odd admission: it agrees Amazon “has every right to refuse to sell consumer goods in response to a pricing disagreement with a wholesaler.”

But wait — isn’t that exactly what Amazon is doing with…