Moby-Dick, written in 1851, recounts the adventures of the narrator Ishmael as he sails on the whaling ship, Pequod, under the command of the monomaniacal Captain Ahab. [We offer a companion Moby-Dick - Study Guide to enhance your enjoyment of the story. Ishmael believes he has signed onto a routine commission aboard a normal whaling vessel, but he soon learns that Captain Ahab is not guiding the Pequod in the simple pursuit of commerce but is seeking one specific whale, Moby-Dick, a great white whale infamous for his giant size and his ability to destroy the whalers that seek him. Captain Ahab's wooden leg is the result of his first encounter with the whale, when he lost both leg and ship. After the ship sails it becomes clear that Captain Ahab is bent on revenge and he intends to get Moby-Dick.