Check the full article for some stark stats for writers and publishers
"While e-books retailers like Amazon, Apple and Barnes & Noble can collect troves of data on their customers’ reading behavior, publishers and writers are still in the dark about what actually happens when readers pick up a book. Do most people devour it in a single sitting, or do half of readers give up after Chapter 2? Are women over 50 more likely to finish the book than young men? Which passages do they highlight, and which do they skip?
Mr. Rhomberg’s company is offering publishers the tantalizing prospect of peering over readers’ shoulders. Jellybooks tracks reading behavior the same way Netflix knows what shows you binge-watch and Spotify knows what songs you skip."Moneyball for Book Publishers: A Detailed Look at How We Read - The New York Times