In the tradition of In the Heart of the Sea and A Perfect Storm, a gripping story of survival in the 19th century Sahara. The western Sahara is a baking hot and desolate place, home only to nomads and their camels, and to locusts, snails and thorny scrub. On 28 August 1815 the US brig Commerce was dashed against Mauritania's Cape Bojador and lost, although through bravery and quick thinking the ship's captain, James Riley, managed to lead all of his crew to safety. What followed was an extraordinary and desperate battle for survival in the face of human hostility, hunger, dehydration and despair, as the crew were captured, robbed and enslaved. They were reduced to drinking urine (their own and the camels'), flayed by the sun, crippled by walking miles across burning stones and sand. And over time James Riley and Sidi Hamet, slave and captor, came to recognize in each other men worthy of respect and the ransom not only of Riley himself but also of a handful of his crew suddenly seemed possible. But Sidi Hamet had enemies of his own, and to reach safety the sailors had to overcome not only the desert but also the greed and anger of those who would keep them in captivity.