Madeleine L'Engle's classic middle-grade series, the Wrinkle In Time Quintet, follows the lives of Meg Murray, her youngest brother Charles Wallace Murray, their friend Calvin O'Keefe, and her twin brothers Sandy and Dennys Murray. Beginning with A Wrinkle In Time, each novel features the characters encountering other-worldly beings and evil forces they have to defeat in order to save the world. The characters travel through time and space and even into Charles Wallace's body in this beloved series that blends science fiction and fantasy.