The Vatta Series is a science fiction book series written by Elizabeth Moon. It follows the adventures of Ky Vatta, a young woman from a family of space traders, who becomes a skilled leader and strategist after her family's business is attacked. The series explores themes of survival, leadership, and the complexities of interstellar trade. The series consists of five main novels, starting with "Trading in Danger" and concluding with "Victory Conditions." Set in a richly developed universe, the books feature a mix of action, political intrigue, and character development, appealing to fans of both military and space opera genres.