Children's Literature, Fantasy, Quest
A Wrinkle in Time is published as a children's or young adult book, and like much children's literature, it features young protagonists who go off on a quest in the absence of their parents. In A Wrinkle in Time this quest takes them to other planets, where they meet strange and fantastical beings. At the end, the object of their quest is achieved, though in not quite the way they expected, and they return to the normal, every-day world.