This is a great analysis. Wish I’d thought of it!! It is tempting to go out and do a similar types of maps on different groupings of books. In any case, check it out. Fun analysis. And it uses graph theory!
I used the political books on the New York Times Bestseller List as a starting point for ‘snowball sampling’. In the network map above, two books are linked if they were bought together. The network is organized and displayed by an algorithm that looks at the pattern of connections and finds the emergent structure. Nodes with only one or two links, and unrelated clusters that had no bridging role, were removed for clarity.
(via BoingBoing)
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