For years, the digital media service Hoopla has given library patrons access to ebooks, movies, and audiobooks through bulk subscriptions sold to public libraries. But more recently, librarians have started calling for transparency into the company’s practices after realizing its digital ebook collection contains countless low-quality titles promoting far-right conspiracy theories, COVID disinformation, LGBTQ+ conversion therapy, and Holocaust denial. In February, a group of librarians in Massachusetts identified a number of Holocaust denial and anti-Semitic books on Hoopla, including titles like “Debating The Holocaust” and “A New Nobility of Blood and Soil”—the latter referring to the infamous Nazi slogan for...