In a similar vein to the previous post, Random House recently launched an update to their site. It's responsive and the type is well set.
Ordering books online can be a risky proposition. But the Random House site gives each book a thorough summary. It's the most pleasurable experience I've had previewing potential books to purchase (apart from Amazon reviews, natch). Whether you're looking for a new book or not, the site itself is worth a look.