The Treasure of Savage Island — Lenore Hart

Rafe is an escaped slave, shipwrecked while stowing away to Boston. Molly is the strong-willed, penniless island girl who rescues him. Their wary friendship is tested when Savage Island is raided by picaroons still loyal to England after the Revolution. The two must work together to save Molly's wounded father, expose a traitor, find a legendary treasure to free Molly's family from debt, and spirit Rafe away to freedom.