Challenger (The Siggy Smith Series Book 1)

Details: Siggy Smith is an immigrant, a wife, a mother, a soldier, and a shapeshifter. Today, she is a confessed killer convicted of first-degree murder. She's accepted her fate, and sits in shackles as her death draws near when a government official offers her a chance to wipe her record clean: join a new, military experiment called M.O.N.S.T.R.