Madeleine L'Engle's Time Quartet-Boxed Set 4 Vols

the long version

This first volume gathers Wrinkle with three books that chronicle the continuing adventures of Meg and her siblings. In A Wind in the Door, Meg and Calvin descend into the microverse to save Charles Wallace from the Echthroi, evil beings who are trying to unname existence. When a madman threatens nuclear war in A Swiftly Tilting Planet, Charles Wallace must save the future by traveling into the past. And in Many Waters, Sandy and Dennys, Meg's twin brothers, are accidentally transported back to the time of Noah's ark --