E-books - tracking their readers?

I wasn't surprised to learn that e-books - of which I'm an avid consumer - are also being used to build a profile of their users.  The Wall Street Journal reports:

It takes the average reader just seven hours to read the final book in Suzanne Collins's "Hunger Games" trilogy on the Kobo e-reader—about 57 pages an hour. Nearly 18,000 Kindle readers have highlighted the same line from the second book in the series: "Because sometimes things happen to people and they're not equipped to deal with them." And on Barnes & Noble's Nook, the first thing that most readers do upon finishing the first "Hunger Games" book is to download the next one.

For centuries, reading has largely been a solitary and private act, an intimate exchange between the reader and the words on the page. But the rise of digital books has prompted a profound shift in the way we read, transforming the activity into something measurable and quasi-public.

. . .

The major new players in e-book publishing—Amazon, Apple and Google—can easily track how far readers are getting in books, how long they spend reading them and which search terms they use to find books. Book apps for tablets like the iPad, Kindle Fire and Nook record how many times readers open the app and how much time they spend reading. Retailers and some publishers are beginning to sift through the data, gaining unprecedented insight into how people engage with books.

. . .

Barnes & Noble, which accounts for 25% to 30% of the e-book market through its Nook e-reader, has recently started studying customers' digital reading behavior. Data collected from Nooks reveals, for example, how far readers get in particular books, how quickly they read and how readers of particular genres engage with books. Jim Hilt, the company's vice president of e-books, says the company is starting to share their insights with publishers to help them create books that better hold people's attention.

. . .

Mr. Hilt says that the company is still in "the earliest stages of deep analytics" and is sifting through "more data than we can use." But the data—which focuses on groups of readers, not individuals—has already yielded some useful insights into how people read particular genres. Some of the findings confirm what retailers already know by glancing at the best-seller lists. For example, Nook users who buy the first book in a popular series like "Fifty Shades of Grey" or "Divergent," a young-adult series by Veronica Roth, tend to tear through all the books in the series, almost as if they were reading a single novel.

Barnes & Noble has determined, through analyzing Nook data, that nonfiction books tend to be read in fits and starts, while novels are generally read straight through, and that nonfiction books, particularly long ones, tend to get dropped earlier. Science-fiction, romance and crime-fiction fans often read more books more quickly than readers of literary fiction do, and finish most of the books they start. Readers of literary fiction quit books more often and tend skip around between books.

Those insights are already shaping the types of books that Barnes & Noble sells on its Nook.

There's more at the link.  Interesting and recommended reading.

I wonder whether this sort of information will be made available to authors?  It might help them craft their books to better suit their target demographic.  If it helps publishers, why shouldn't it be used to help those who supply the publishers with their raw material?

Peter