On the morning of November 20, 1820, in the Pacific Ocean, an enraged sperm whale rammed the Nantucket whaler Essex. As the boat began to sink, her crew of thirty had time only to collect some bread and water before pulling away in three frail open boats. Without charts, alone on the open seas, and thousands of miles from any known land, the sailors began their terrifying journey of survival. Ninety days later, after much suffering and death by starvation, intense heat, and dehydration, only eight men survived to reach land. One of them was Owen Chase, first mate of the ill-fated ship, whose...