As Camden was a horrific Patriot loss, there are not many books written about the battle.
Piecuch, Jim. The Battle of Camden: A Documentary History (Amazon ebook: The History Press, 2006).
Smith, David and Turner, Graham. Camden 1780: The annihilation of Gates’ Grand Army (Kindle Edition: Opsrey Publishing, Inc., 2016).
Davis, Robert Scott, Thomas Pinckney, and William Johnson. “Thomas Pinckney and the Last Campaign of Horatio Gates.” The South Carolina Historical Magazine 86, no. 2 (1985): 75-99. http://www.jstor.org/stable/27567893.