When e-book pricing negotiations fell through with Hachette in May (we assume this was less "negotiations" and more a Mr. Burns-esque "Release the hounds!"), Amazon decided to stick it to them by suddenly fucking over every book associated with the publisher. Overnight, even big authors like J.K. Rowling had the purchase buttons from their books literally removed. For those lucky enough to keep their books available, Amazon instilled an artificial two- to three-week extra delivery time.
Colbert has a shorter wait to get The Late Show than his book.
Other book authors reported inflated prices and convenient recommendations to similar but cheaper books, presumably leading to a sudden spike in sales for the Larry Cotter: Boy Witch series. It's not the first time Amazon has been accused of shady practices (including secretly charging extra shipping fees, passing off fake Chinese cosmetics as the real thing, and selling illegal and prescription drugs to anyone with a credit card), but they've never been so brazen about it. Hell, they flat out admitted they were intentionally discouraging people from buying Hachette books, even going so far as to say that if you want them so bad, you can buy them from their competitors.
"... for now."