Erin and Brett Arnold bought the Avid Reader and Avid Reader Active this winter from longtime owner Alzada Knickerbocker. Buying the town’s last full bookstore, and their plans to keep it as a bookstore, is significant news if you’re interested in Davis, books, and/or downtown. The Arnolds visit Davisville today to talk about the store, bookselling, co-existing with Amazon, why the store has persisted, and why they see a good future for it. Some statistics support their optimism: Although sales of printed books in the United States fell about 1.2 percent in 2019 from the year before, they’re still up 16 percent from 2012.