The Time Quintet is a series of science fiction novels written by Madeleine L'Engle. The quintet includes A Wrinkle in Time, A Wind in the Door, A Swiftly Tilting Planet, Many Waters, and An Acceptable Time. Each book follows the adventures of the Murry family as they navigate time travel and encounter various challenges and mysteries. With its blend of science fiction, fantasy, and philosophical themes, The Time Quintet offers a captivating and thought-provoking reading experience.