The Pawn Series Book Six: The Martian Sunrise

In a dystopian world, Earth, Moon, Mars and Asteroid-belt population fights against a new enemy, the Venatores. The enemy is the descendants of the DNA altered humans, the runaway Super soldiers that the Companies had produced inside their military Labs. Some of them look like humans, but most of them were like monsters to normal humans.
Captain Eriksen has hired the Pawn, Pei Pei to the M45. She is now with the Queen Mary whom the Captain had found on the Moon. Mary, the super-intelligent girl causes trouble at the Base. Pei Pei and Mary are both enhanced humans who try to get along with others and learn to behave like them.
The M45 Unit's new Mars Base prepares for an enemy attack. The Venatores and other old enemies of the Unit are gathering. P31x2, aka Pei Pei, plans missions with Queen Mary and the M45 crew to gain information about their enemies. Old enemies threaten the Mars Base, and surprising news turns Pei Pei's world upside down. The Red Planet shows its true nature.