In the tradition of Dava Sobel's Longitude comes this dramatic tale of invention and discovery--an eloquent elegy to one of the most important navigational instruments ever created, and to the daring mariners who used it to explore, conquer, and map the world.Barrie takes readers straight to the helm of some of history's most important expeditions, interweaving these heroic tales with the account of his own transatlantic passage as a young man. A heady mix of adventure, science, mathematics, and derring-do, Sextant is infused with a sense of wonder and discovery. At once a dramatic history of maritime endeavor and a love letter to the sea and sky, it is timeless storytelling at its best.