Amazon's war against the big five stemmed from disagreements about pricing. The website wanted to offer most eBooks for $10 a pop, but the publishers wanted the power to set each title's price. Things got so bad, they struck a deal with Apple in an effort to raise prices -- an action that ultimately led the DOJ to charge them all with collusion. Amazon also engaged in a very public spat with Hachette last year, even going so far as to refuse selling its books.

Based on the contract info we've mentioned above, it looks like Amazon gave in to the publishers' demands. Seeing as books earn Amazon billions of dollars, making up around seven percent or so of its yearly revenue, we don't think the company feels that bad about it. As for the publishers, we'll bet they're thankful that they're all, well, civil again -- after all, the e-commerce titan dominates online sales of both physical and digital tomes.