at Amazon (I've had it on my wishlist):
Skeletons on the Zahara chronicles the true story of twelve American sailors who were shipwrecked off the coast of Africa in 1815, captured by desert nomads, sold into slavery, and subjected to a hellish two-month journey through the perilous heart of the 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 -- and its barren and ever-changing coastline has baffled sailors for centuries. In August 1815, the US brig Commerce was dashed against 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, starvation, dehydration, death and despair.
Captured, robbed and enslaved, the sailors were dragged and driven through the desert by their new owners, who neither spoke their language nor cared for their plight. Reduced to drinking urine, flayed by the sun, crippled by walking miles across burning stones and sand and losing over half of their body weights, the sailors struggled to hold onto both their humanity and their sanity. To reach safety, they would have to overcome not only the desert but also the greed and anger of those who would keep them in captivity.