The Brooklyn Book Festival returns to Borough Hall Plaza this Sunday, September 16, for its second year. The free event runs from 10 a.m.-6 p.m. and includes well-known authors, poets and essayists, as well as some new up-and-comers. With readings, presentations and over 100 vendors participating, this is an opportunity to see your favorite authors or learn about new ones. While you’re there, drop by the Polytechnic display at booth 62 and discover what Poly professors have published.