I really dig this website. It’s both a cool idea and a great looking site design. You would expect the guy that runs WooThemes would have a great looking website no matter what the subject matter is and this one delivers.
There are a lot of little details worked into the interactions, from the fixed elements to the bookmark looking tab when you are on a certain page of the book/site, that make this site visually rich. I love the drop down design treatment for the “teasers” section too, that’s just clever.