Founded in 1997, BookFinder.com has become a leading book price comparison site:
Find and compare hundreds of millions of new books, used books, rare books and out of print books from over 100,000 booksellers and 60+ websites worldwide.
The Philosophers Toolkit:
The Philosophers' Toolkit provides all the intellectual equipment necessary to engage with and participate in philosophical argument, reading and reflection. Each of its 87 entries explains how to use an important concept or argumentative technique accurately and effectively. [via]