The past few years have seen record e-book lending for libraries — as well as record profits for OverDrive, the company that provides e-books access for 95 percent of libraries in the U.S. (OverDrive’s profits have trickled up — the company was bought by the private equity firm K.K.R. in 2015.) But as library e-book lending has taken off, so has another trend: book bans. Book bans...
