Calling all book nerds! The Midwest’s biggest free outdoor literary festival returns this September for its 37th year with everything from a huge outdoor book market spanning five blocks (Dearborn Street from Ida B. Wells Drive to Polk Street, and Polk Street from State Street to Clark Street) to talks with artists and authors, including a discussion with former U.S. Poet Laureate and Pulitzer Prize winner Natasha Trethewey. Other speakers include Rebecca Makkai (The Great Believers), Marie Myung-Ok Lee (An Evening Hero) and Jamie Ford (The Many Daughters of Afong May), as well as appearances from The Poetry Foundation and The Onion.