While e-book sales have been leveling off as they absorbed the replacement audience for mass market
paperbacks — because e-book prices are cheap in mass market territory — the sector of e-books that have been selling the best are the first - run
new bestsellers — the ones with the highest e-book prices initially (although those prices come down over time, just like a
paperback edition and the e-book prices are lower than hardcover and
trade paper usually.)