"Moby Dick" is a novel by Herman Melville that tells the story of Ishmael, a sailor who joins the whaling ship Pequod. The ship is captained by the obsessed Captain Ahab, who is determined to hunt down a giant white whale named Moby Dick. This whale had previously destroyed Ahab's ship and bitten off his leg, fueling Ahab's desire for revenge. As the crew sails across the ocean, they encounter various challenges and adventures. The story explores themes of obsession, revenge, and the struggle between man and nature. Ultimately, Ahab's quest leads to a dramatic and tragic confrontation with the formidable whale.