Generation warriors

de Anne McCaffrey, Elizabeth Moon

"Generation Warriors" is the third book of "The Planet Pirate Series", a trilogy narrating the life of the young girl Sassinak, enslaved by planet pirates, and her later career in the Federal Space Fleet as a pirate chaser. In the third book Sassinak meets her great-grandmother Lunzie, who had to spend many years in the "cold sleep" to survive from an attack. Now both women are nearly at the same biological age and decide to work together to eventually end the threat of the planet pirates.