Digital borrowing of e-books, audiobooks, and digital magazines rose to more than 739 million checkouts at the libraries and schools who use OverDrive’s Libby and Sora apps. Some 366.2 million e-books were borrowed last year, the most of any format, but the rate of increase, 7%, was the slowest among all formats. Downloads of digital audiobook rose 19%, to 278.3 million checkouts. Source: Digital Checkouts Rose 17% at OverDrive