Sanguine Moon - Camazotz Trilogy Book Two.
When Connie Phillips began keeping secrets from her adoptive parents, she was unaware of the darkness she would bring into her world. Discovering she is the daughter of a crime lord had consequences even she could never have predicted. Consequences that put her first real love--Rocks--and her adorable baby sister in mortal danger.
With many lives balanced in her hands, Connie must find a way to save Rocks' life, while keeping his identity a secret. Navigating the antiquated ways of the Camazotz culture, while trying not to offend the colony's leaders with her modern technology, is harder than Connie ever imagined.
When Rocks defies certain death using present-day medicine, the Camazotz are torn. If they consider modernizing, they risk discovery and subsequent extermination by the aeronaughts. But hiding away in their mountain roost has left them vulnerable to an unidentified enemy slowly picking them off one bat at a time.