Episode #6 of the Boing Boing Boing podcast is ready for downloading. Our guest for this edition is author Steven Johnson, whose new book "The Ghost Map" my blog-mate Pesco describes as:

An account of an 1854 cholera outbreak on London's Broad Street [and] a magnificent combination of science thriller, cultural history, and celebration of cartography as a powerful tool to help us understand the dynamics of urban life.