"Seventeen-year-old Clara runs away from home to join a vigilante monster-flghting squad, only to discover that sometimes the most dangerous monsters are where you least expect them." -- (Source of summary not specified)

Clara is ready to fight back against her abusive father, against the only life she's ever known, and most of all, against scrabs, the earth-dwelling monsters that are currently ravaging the world. When an opportunity arises for Clara to join an international monster-fighting squad, she jumps at the chance. Training with her teammates, Clara realizes what fighting monsters really means: sore muscles, exhaustion, and worst of all, death. Scrabs are unpredictable, violent, and terrifying. As Clara gains confidence in her battle skills, she starts to realize scrabs might not be the biggest evil. The true monsters are the ones you least expect. -- adapted from jacket