Moby-Dick is considered to be one of the Great American Novels and a treasure of world literature, one of the great epics in all of literature. The story tells the adventures of wandering sailor Ishmael, and his voyage on the whaleship Pequod, commanded by Captain Ahab. Ishmael soon learns that Ahab has one purpose on this voyage: to seek out Moby Dick, a ferocious, enigmatic white sperm whale. In a previous encounter, the whale destroyed Ahab's boat and bit off his leg, which now drives Ahab to take revenge. A novel that delves with astonishing vigor into the complex souls of men, Moby-Dick is an impassioned drama of the ultimate human struggle that the Atlantic Monthly called “the greatest of American novels.”