Dark Lightning is the fourth and last in my Thunder and Lightning series.
Cassandra Ann and Pollyanna Sue are 18-year-old identical twins from an illustrious family. Their great-grandparents were among the first people to land on Mars. Their grandparents fought in the wars to keep Mars free. Their mother, Podkayne, is a famous musician and was present when giant crystals from Europa invaded the Earth. Their father, Jubal, invented the space drive that made interstellar travel possible. Now they are halfway to another star in the gigantic spaceship Rolling Thunder, nearing the speed of light, when their father announces that the ship must be stopped. Now the girls have their chance to change the world, too … if they can just get their minds off shopping, boys, and the upcoming skypool tournament.