Star Breaker Books in Order

Former space miner Holly Cropper now serves as a lieutenant in the Earth Alliance Marines. Responding to a mining vessel's distress call leads her small squad from an apparent pirate takeover into an invasion by ancient aliens.

An awards ceremony for Holly Cropper and her Marines is attacked by the same kind of robots they recently defeated. Tracking down the machines becomes urgent as their assault threatens to spread across Mars and destroy the red planet.

Holly Cropper's Marines travel to Pluto to recover and prepare for another mission, expecting Professor Crow to share crucial discoveries. A prison rebellion interrupts those plans, forcing them to protect scientists whose knowledge could help win the war.

Holly Cropper returns toward her home world after a corporation sells robots built with alien technology to the Sons of Thor. Confronting the revolutionary group means facing her own past while the original alien threat remains unresolved.

While overseeing defenses against the Thaal, Holly Cropper's Marines are sent to aid an attacked generation ship. Hundreds of passengers are trapped aboard the crippled Sun Kisser, leaving the squad to attempt a rescue under continuing assault.

Holly Cropper and the Earth Alliance Marines search for technology that could help repel the Thaal after exposing a traitorous corporation. Locating a hyperspace gate becomes a race against its activation and the possibility of another invasion.