Amazon sells most Kindle books for $9.99 or less. Publishers say that they generally sell electronic books to Amazon for the same price as physical books, or about 45 percent to 50 percent of the cover price. For a hardcover best seller like Scott McClellan’s “What Happened,” the former press secretary’s account of his years in the Bush White House, that would mean that Amazon appears to be selling the selling the book for about 25 percent below its cost.

— New York Times Article, Electronic Device Stirs Unease at Book Fair

It’s always hard to change your world view when the world changes underneath you.