How Much Of A Book Do You Actually Read?

In the age of Big Data, publishers increasingly want to know just how much of a book purchasers actually read, or so says a story in the March 15 New York Times.

Amazon, Apple and other purveyors of e-books apparently already have a lot of such data when it comes to people reading books in electronic form, but that is roughly only about 25% of the market and readership of e-books is, at best, leveling off at present, various reports have suggested. Readership data for books on paper is another matter.

To fill the gap, The Times reported, a London-based firm named Jellybooks has a device readers can use, in exchange for free books, to track their reading activity and transmit that data to the company, which then provides it to participating publishing companies, presumably for a fee.