Books in the A Helium-3 Novel series

A MINING COLONY ON THE MOON. A DEADLY MISSION. AND A SECRET BIGGER THAN TWO WORLDS.

She was born to kill, born to die. Crescent is a crowhopper---a genetically modified mercenary programmed for ruthless warfare. When she's taken prisoner by Crater Trueblood instead of being killed in battle, she thinks it's a disaster.

A kidnapped lunar heiress. A deranged-science syndicate. An imminent asteroid impact. Crater Trueblood has more to rescue than just his ex-girlfriend . . . namely the entire human race.