EZBuyButton Buy Book Widget for Authors plugin allows you to embed the EZBuyButton on Posts, Pages, and on the Sidebar. EZBuyButton is a "buy now
I agree with 'Screwed' from Feb/13 ... I wonder if the developer is even trying to fix this plugin. I downloaded and before I even entered any info, my theme was a mess. It did correct itself once the plugin was deleted though. What a waste of time especially when I thought Amy Joy had given it 4 Stars because it had worked ... until I read her whole review!! It seemed very hopeful and could be great if the bugs were fixed but not to be at this time.
Just installing this theme, before I even had a chance to test it out or add any books to it, and it somehow screwed up my theme. Post text was all over the place, images were appearing twice, paragraph breaks disappeared, it was just a mess. Once I deleted the files, everything returned to normal.