Peter Brantley at the Social Sciences Research Council blogs reproduced a debate about Google Book Search that occurred in a mailing list among Paul Duguid, Tim O’Reilly, Danny Sullivan and Donald Waters.
With Kindle, Can You Tell It’s Proust? by Joanne Kaufman is a news article in the New York Times I thought worth mentioning.
Koufogiannakis, D., & Crumley, E. (2006). Research in librarianship: Issues to consider. Library hi tech, 24(3), 324-340. https://www.emeraldinsight.com/doi/10.1108/07378830610692109
I saw this observational market research in action at my library.