Two National Park Service historians who wrote a history of Robert Smalls will sign copies of the book on Friday.

Lu Ann Jones and Robert K. Sutton will sign copies of “The Life and Legacy of Robert Smalls of South Carolina’s Sea Islands” at 2:15 p.m. on Friday at Liberty Square, 340 Concord St.

Smalls led a daring slave escape from Charleston during the Civil War and went on to become a South Carolina congressman. This weekend marks the 150th anniversary of Smalls’ commandeering a Confederate boat and sailing to freedom. The National Park Service will host events Saturday and Sunday.