A Wrinkle in Time
Mr. Murry  -  Meg's father and a physicist who works for a top-secret government agency on experiments with travel through space-time in the fifth dimension. In trying to tesser to Mars (i.e., travel through a tesseract, or wrinkle in time), he is captured and imprisoned on the dark planet of Camazotz. When the plot begins, no one on Earth has heard from him for over a year.