Sorry you don't like the design, but I honestly can't really agree that it's "too much work" to find the "buy" buttons: you just have to scroll one screen. I have a hard time imagining there are people out there who desperately want to buy this eBook, but are thwarted by the 300 extra pixels… After all, not every site has to scream "buy!" "buy!" in people's face.
That being said, thanks for taking the time to write down your feedback, I appreciate it!