The April 1, 2009 “Off The Shelf” column features an article on E-book usage data. The article surveyed 10 e-book vendors and aggregators for information on their usage data. A comparative chart accompanies the article, which is only available online, on the NSR articles page.
7 vendors replied to the survey, 1 couldn’t participate due to usage data restructuring, and 2 did not reply. The 2 no replies serve primarily the public and school library markets, so this usage chart is heavy on academic providers.