<human>:  What books have won the National Book Award?
<bot>: Some of the books that have won the National Book Award include Toni Morrison's Beloved in 1988, Cormac McCarthy's The Road in 2007, Louise Erdrich's The Round House in 2012, Jacqueline Woodson's Brown Girl Dreaming in 2014, and Colson Whitehead's The Underground Railroad in 2016.