The Orbital Sword: Persepolis Rising

Thirty years have passed since the events of Babylon's Ashes and Earth is back on its feet after the attack that crippled the planet in Nemesis Games. The crew of the aging gunship Rocinante are still together, working contracts for the Transport Union, who have control of the Ring station and the 1,300 worlds the gates lead to. No one has heard from Admiral Duarte and his rogue fleet in the thirty years since they broke away from the Martian Congressional Republic Navy, until now. They have spent their time in the Laconia system building an advanced fleet using leftover technology from the protomolecule creators. They return through their gate to take over Medina Station and launch an attack on the Sol system.