"The Serrano Legacy," an entertaining SF sequence with strong female leads and a realistic space-military flavor, began with Hunting Party. Young lieutenant Esmay Suiza came to center stage in book 4: Rules of Engagement is book 5, continuing her story.
Suiza may be a fine leader and tactician, but she doesn't know how to handle falling for Ensign Barin Serrano, a man she outranks. Frictions in command training school worsen when well-born beauty Brun makes a play for Serrano: Suiza's explosion of temper blights her career. Then Brun falls into the hands of the series' most plausibly nasty villains to date, a murderous, Bible-thumping militia that controls several planets where women are kept down and--if they protest--are surgically deprived of their voices. Moon remarks:
... it would be not only useless but dishonest to pretend that the New Texas Godfearing Militia did not derive its nature from elements all too close to home, in Waco, Fort Davis, and even Oklahoma City.
The "Nutex" have also grabbed a nuclear arms cache for Oklahoma-style terrorist bombing in Familias space, home of the Fleet in which Suiza and Serrano are officers. Multiple story lines cover Suiza's wrestle with her public and private life, Brun's sufferings and determination, Serrano's ups and downs with unwritten rules of command, and eventually a risky rescue mission into a Nutex solar system. Things work out excitingly and as they should. This is enjoyable interstellar adventure that is more harrowing than previous episodes.