Adventure stories can be fiction or nonfiction. Adventure can be as simple or as complex as a coming of age story.
Life can be an adventure.
Alexander, Lloyd, The Iron Ring. A young king must travel to a distant kingdom to regain his honor. The mythology of India adds a remarkable dimension to this fantasy that Alexander peoples with his usual cast of fascinating characters. Obedient Charlotte becomes a strong and independent young woman on a transatlantic crossing in 1832. When she realizes the true nature of the captain she joins the mutinous crew and eventually commands the ship.