During the Revolutionary War, fourteen-year-old Nathan joins forces with his older cousin, the inventor David Bushnell, to secretly build the first submarine used in naval warfare.

    But things do not turn out as they had expected. The sole survivors of a terrible shipwreck, they wash ashore to learn that the danger has only begun. Their new world will test their courage, cleverness, endurance, and faith as they struggle to survive and create a civilization of their own in the wilderness. Note: This Townsend Library classic has been carefully edited to be more accessible to today's students. It includes a brief author's biography and an afterword that provides important context about the work.