Some interesting data about the changing way in which we hear about books (via Mitchell Waters):
Two years ago, 35% of book purchases were made because readers found out about a book in bricks-and-mortar bookstores, the single-largest site of discovery. This year, that figure has dropped to 17%, a reflection both of the closing of Borders and the rise of e-readers. In the same period, personal recommendations grew the most, to 22% from 14%. Some three-quarters of personal recommendations are made in person, while the rest come by e-mail (8%), phone (7%), Facebook (4%) and other social networks (3%).