Sebastian and the Invisible Island, Book 3: Zeppendulars
by Michael William Hogan
Sebastian Linus Youngfield is sailing the world with his parents, Cameron and Anne, when their voyage takes a dramatic turn in the South Pacific. A massive storm blows in leaving Sebastian adrift at sea in a small dinghy. To survive the adventures ahead, he must cast fear into the depths and summon every skill learned in his young life.