In Rescue on the River, the third book in a three-part story arc focusing on the US Civil War era, cousins Patrick and Beth attend Abraham Lincoln's inauguration and discover that their friend's brother Kitch is a slave in South Carolina. The cousins search for Kitch as they travel down the Combahee River with Harriet Tubman. They help with the secret mission of the Second South Carolina Volunteers, an African American unit. Will they be able to find and rescue Kitch?" --