Unsurprisingly, ebooks saw a surge in popularity this year, but that continues a trend of increasing ebook checkouts. The most common ebook checkout of the libraries surveyed was The Four Winds by Kristin Hannah, followed by The Vanishing Half by Brit Bennett. The most popular nonfiction title was Caste: The Origins of Our Discontents by Isabel Wilkerson, and the most popular kids’ book was Diary of a Wimpy Kid: The Deep End by Jeff Kinney. Here are the 7 most popular books checked out from these libraries: You can see the other top books at Quartz. Find more news and stories of interest from the book world in Breaking in Books.