Science Fiction/Fantasy flowchart
A Guide to Navigating NPR's Top 100 Science Fiction and Fantasy Books.
"Over the summer, NPR solicited the input of its listeners to rank the top science fiction and fantasy books of all time. Over 60,000 people voted for the top picks which were then compiled into a list by their panel of experts. We at SF Signal have, once again, come to the rescue. This flowchart is designed to help you follow your tastes, provide context, and fulfill (indeed exceed!) any need for pithy commentary you might harbor."
A printable list
An interactive version