The theme of Treasure Island?

Treasure Island is an adventure tale, but it is also the story of one boy’s coming of age. At the outset of the novel, Jim is a timid child, but by the end he has matured incredibly. He has outwitted pirates, taken over a ship, and saved innumerable lives. Jim has become an adult in character if not in age. Like any maturing boy, Jim must try out various male role models. Jim’s father does not appear to be a significant role model: he passes away early in the novel, and even before that he does not seem to have much effect on Jim’s inner life. In fact, Jim scarcely mentions his father in his narrative.