A big spike for The Big Switch("The Big Switch"的一个快速增长)

We saw an amazing spike in the Bookscan sales data for Nicholas Carr's The Big Switch (a business book about the switch to utility or cloud computing) this past week.

We were curious about this huge jump. We see some recent activity in the blogosphere, but nothing jumps out at us as driving this spike. Perhaps there was a publisher promotion? But if anyone knows of recent internet activity that could have driven a spike of this magnitude, we'd love to learn about it. (We're always interested in learning about online sources that drive book sales