Not too long ago, NPR posted the results of its Top 100 Science Fiction and Fantasy Books survey. But how should you decide which book to read next? Blastr (@blastr) posted a great flowchart to help you decide. Designed by T.N. Tobias of SF Signal (sfsignal.com, @sfsignal), it’s huge, funny, and very useful. With fall’s arrival, pick out a few books to read while under your favorite blanket.