In the WSJ: Excellent piece on how book reading is now less than a solitary activity with e-books. The new books are also reading you and gathering and leveraging deep analytics about this activity.
" ... In the past, publishers and authors had no way of knowing what happens when a reader sits down with a book. Does the reader quit after three pages, or finish it in a single sitting? Do most readers skip over the introduction, or read it closely, underlining passages and scrawling notes in the margins? Now, e-books are providing a glimpse into the story behind the sales figures, revealing not only how many people buy particular books, but how intensely they read them ... "