Moby Dick by Herman Melville.

Moby Dick sets off in New York City, then continues on to New Bedford, Masachusetts, and then moves to Nantucket, which is where the voyage beings, on the whaling ship, the Pequod. The voyage of which Ishmael signed up for was to just typically go whaling and for others, to make some 'booty', but once the whalers aborded the ship, they were in for a real call. The voyage turned out to be a quest for Captain Ahab's vengeance for his lost leg on Moby Dick. The journey was quite the adventure, although, there were obstacles by the fighting forces of the sea, and of course, Moby Dick. This is where Melville puts a twist on the plot. Ahab is the bad guy yet the good guy. Moby Dick is the bad guy yet the good guy too. So does this mean Ahab and Moby Dick are both the antagonist and protagonist? Yes, yes it does, but through the epic sea battle only one hero can be victorious, and that hero is the Great White Whale. Due to Ahab's tragic flaw and obsession of revenge on Moby Dick he is sunken down into the sea with the Pequod itself. Moby Dick is a heroic tale yet a tragedy.