“Returns are the dark side of the book world, marking not only failed expectations, but the crippling inefficiencies of an antiquated business. It’s a problem that’s only getting worse. The industry’s current economic model pushes publishers to generate a small number of blockbuster hits. But picking winners is a quixotic enterprise, and as publishers ship an ever-increasing number of books to stores, hoping to hit the jackpot every time, stores are sending an ever-increasing number back.”