"A Wrinkle in Time" is a science fiction novel written by Madeleine L'Engle, first published in 1962. The story follows a young girl named Meg Murry, her brother Charles Wallace, and their friend Calvin O'Keefe as they embark on a journey through space and time to rescue Meg's father, who is trapped on a distant planet. The trio encounters various challenges and strange beings, including the mysterious Mrs. Whatsit, Mrs. Which, and Mrs. Who, who help guide them. The novel explores themes of love, individuality, and the battle between good and evil, making it a beloved classic in children's literature.