Generation Warriors

by Elizabeth Moon

The title character from the first book of the trilogy - Sassinak - teams up with the main character from the second - her great-great-great grandmother Lunzie - to end the threat posed by planet pirates. An interesting plot point is that in terms of physical age and experience the granddaughter is over a decade older than her ancestor because the latter went through several lengthy periods of stasis (known as cold sleep) leading to questions of who is the "more experienced" elder.