The Gaithersburg Book Festival is a free annual celebration of great books and great writing that has made its mark as one of the nation’s top literary events. Nearly 100 featured best-selling and award-winning authors – including S.A. Cosby, Erika Meitner, Jacquelyn Mitchard, John Scalzi and Peter Reynolds – will participate in presentations and panel discussions. Being held May 21 in Gaithersburg, Md., the Festival also includes interactive writing workshops, a Children’s Village, book sales, author signings and more. Admission and shuttles from Shady Grove Metro and Lakeforest Mall are FREE.