- While I like the script font in your logo, I think it's a little too hard to read. The letterforms of the "u" and "v" are very similar and could use some slight modification to differentiate them. The kerning is also off - the letters are suppost to connect, but the tracking is too wide.
- I think there's too much movement on the home page. There are three sections that animate (the slideshow, press, and recent activity). All that movement distracts from your call to action. Think about what you want a new visitor to focus on when they first see the page. (This is admittedly not as much of a problem for people with smaller monitors, but I can see below the fold)
- Why not make your search bar in the header wider? Longer titles are cut off.
- I'd shorten your overview sentence ("Share what you read with your friends and discover new books?") and maybe set it in a different color or font to help it stand out. I think this is a very important sentence.
Overall it looks great! Good luck!