Escape to Fort Abercrombie

"Mama and little Elsa are kidnapped by Indians. As his father lies dying, fourteen-year-old Ryker Landstad promises to take the nine-year-old twins to safety and rescue Mama and Elsa. It takes all Ryker's gumption, to reach the fort, only to discover that Fort Abercrombie is besieged by 500 warriors"--