Google Book Search Adds Shelfs

Google Book Search has just undergone a massive redesign. They have added shelves as categories to search for books.
In the past it was very hard to discover new book without specifically looking for a certain book. You would type in a name of a book or author and sort through traditional Google listing that might even have a picture. Not any more now it is like going to the library.

Google Book search now has shelves jus tlike you library or local book store. The page loads the Interesting, Classics, Highly cited, and a Random subject's shelves showing. It also has these shelves on the left hand side:
Fiction

Literature
Science fiction
Fantasy
Romance
Mystery
Fairy tales
Short stories
Poetry

Non-fiction

Philosophy
Economics
Political science
Linguistics
Mathematics
Physics
Chemistry
Biology

Random subjects

Cosmology
Nuclear energy
Toys
Europe
Astrology
Space ships
High performance computing
Human locomotion

The main shelves show four algorithmically selected books on each that are different every time you view the page. Each book is represented by a image of it's cover. If there is no cover image available Google creates one composed of the title and the author's name.
When you click on a book it will show the book (what is available per copyright) and a preview if available. You can buy some books and classics (public domain) can be downloaded in pdf. This pdf is watermarked by Google and you are asked not to use it for a commercial purpose. They wouldn't want you making money of their hard work.
They are making money of their hard work. Google now uses Adsense below the viewing pane.