"A Wrinkle in Time" is a science fiction/fantasy novel written by Madeleine L'Engle. The story follows the adventures of Meg Murry, her younger brother Charles Wallace, and their friend Calvin O'Keefe as they travel through space and time to rescue Meg and Charles Wallace's father, who has been captured by an evil force known as the Dark Thing. Along their journey, they encounter strange beings and visit different planets, all while learning about the power of love, courage, and the importance of embracing one's individuality. The book explores themes of good versus evil, the nature of time and space, and the strength of familial bonds. It is a beloved classic that has captivated readers of all ages since its publication in 1962.