IN March 2009, an eternity ago in Silicon Valley, a small team of engineers here was in a big hurry to rethink the future of books. Not the paper-and-ink books that have been around since the days of Gutenberg, the ones that the doomsayers proclaim — with glee or dread — will go the way of vinyl records.

No, the engineers were instead fixated on the forces that are upending the way books are published, sold, bought and read: e-books and e-readers.