Vatta

Get kicked out of the Academy and the family still hands you a ship. That is the arithmetic Kylara Vatta lives by. Born into Vatta Transport, Ltd. — a dynasty of interstellar traders who reckon their honor in delivered cargo and honored contracts — Ky wants a soldier's commission and gets a merchant hull instead. Then someone starts murdering her relatives and burning the ledgers, and the daughter learns that a trade fleet, armed and angry, is its own kind of war. This is military science fiction run on a merchant's books. The core cycle, Vatta's War, moves in five volumes — Trading in Danger, Marque and Reprisal, Engaging the Enemy, Command Decision, Victory Conditions — as piracy, a sabotaged faster-than-light communications network, and a scattered family push Ky from cautious captain to fleet commander. The later duology Vatta's Peace (Cold Welcome, Into the Fire) drops her, older and decorated, into a colder survival ordeal on her own homeworld. Moon writes clean, competent, procedural: supply lines and boarding actions, chains of command, the cost of a signature on a bad contract. Expect capable women, hard decisions costed to the last credit, and space combat that respects physics and paperwork alike. Begin at the beginning — Trading in Danger — and read straight through in publication order; the arc is chronological and cumulative, no side doors required.