I just discovered this awesome collection of links to book lists. (They stopped updated in 2004, but if the list interests you, you can just google the original list to find the latest entries.)
Among my favorites:
Weatherford’s Great and Significant Books in Anthropology
Top 50 All-Time Bestselling Children’s Books as of January 1, 2001
The Ten Bestselling Books of All-Time
Prapa’s Great and Significant Books in Economics
Agatha Award for Best Cozy Mystery Novel, 1989-2003
Firecracker Alternative Book Award for Nonfiction, 1996-2002
David Evans' personal blog 