A visual representation of the market for political books

Calculated using Amazon’s “customers who bought x also bought y” listings.

Political Books — Polarized Readers — May 2004

The big difference between this network map and the previous two are the number of books in the middle. The release of two popular middle books, colored purple, expose a further network of middle books. Ghost Wars reveals one group of middle books, while The Rise of the Vulcans reveals a second group. Yet, the increase in boundary-spanning books does not indicate a shift in the political landscape. The three network maps are not that different within common statistical limits.

Fascinating and depressing.

Technorati Tags: politics, publishing

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