Amazon.com is making news this week, as its 10th anniversary approaches. The online bookseller has published its top 25 list of authors, based on sales. Most of the usual suspects appear: J.K. Rowling, Dan Brown, Tom Clancy, etc. Also making the cut: J.R.R. Tolkien (#8) and C.S. Lewis (#13). Not bad for a couple of guys who died a generation before Amazon.com was born.