Your E-Book Is Reading You - WSJ.com

On another creepy and cool note -- an excerpt from an e-book big data analysis snapshot

"Meanwhile, the shift to digital books has fueled an arms race among digital start-ups seeking to cash in on the massive pool of data collected by e-reading devices and reading apps. New e-reading services, which allow readers to purchase and store books in a digital library and read them on different devices, have some of the most sophisticated reader tracking software. The digital reading platform Copia, which has 50,000 subscribers, collects detailed demographic and reading data—including the age, gender and school affiliation of people who bought particular titles, as well as how many times the books were downloaded, opened and read—and shares its findings with publishers. Copia aggregates the data, so that individual users aren't identifiable, and shares that information with publishers that request it."

Your E-Book Is Reading You - WSJ.com