Bookrank additions

Just added a few new books to Bookrank.

1. Take a single book from Amazon as a root
2. Take the recommended books for that book
3. Repeat until you have reached a distance of 20 from the original book
4. Add up the number of recommendations for each book
5. Calculate the BookRank from the Distance, Recommendations and SalesRank
6. Display the 250 books with the highest BookRank.

>>> Everyware : The Dawning Age of Ubiquitous Computing by Adam Greenfield

>>> Ambient Findability by Peter Morville

>>> War Against the Weak: Eugenics and America's Campaign to Create a Master Race by Edwin Black

>>> Indigo Children by Lee Carroll

>>> The Great War for Civilisation : The Conquest of the Middle East by Robert Fisk

Update: Mentioned on findability.org