Written by Elizabeth Moon
Format: MP3

From Wikipedia:
Vatta's War is a science fiction series by Texan writer Elizabeth Moon, comprising five books: Trading in Danger (2003), Marque and Reprisal (2004) (Moving Target in UK and Australia), Engaging the Enemy (2006), Command Decision (2007), and Victory Conditions (2008).

The books follow the adventures of Kylara Vatta, a young member of the Vatta family, which runs the interstellar shipping corporation Vatta Enterprises. She had sought a life outside the family business by enrolling in the Slotter Key Spaceforce Academy, but she is forced to resign in her final year and assigned to captain an old trading ship for the corporation. Her military training is put to good use, however, during the crises she faces, first as a ship captain in dangerous situations, and later as the representative of a family under attack.

The first book, Trading in Danger, is narrowly focused on Ky and the local crisis in which she becomes involved. The perspective expands in the later books as connections between piracy and ansible attacks on the one hand and Vatta Enterprises and InterStellar Communications Corporation (ISC) on the other are revealed.