With more than 10,000 gently used books, Spencertown Academy Arts Center’s eighth-annual sale is one of the largest in the region. In addition to selections of contemporary fiction and out-of-print books, the festival also features readings by national and local authors—including editor of My Lunches with Orson Peter Biskind—and activities for kids. Other featured authors this year include Charles Dubow, Hugh Howard, Verlyn Klinkenborg, and Taylor Mali.