A Wrinkle in Time is a beloved science fiction picture book written by Madeleine L'Engle. It follows the adventures of Meg Murry, her brother Charles Wallace, and their friend Calvin as they travel through space and time to rescue Meg's father. Along the way, they encounter strange beings and face various challenges. This book combines elements of science fiction, fantasy, and adventure, and it explores themes of love, courage, and the power of individuality. With its imaginative world-building and memorable characters, A Wrinkle in Time has become a timeless classic.