Six (The Doctors Club Series Book 2)

Exploitation, greed, and murder…there’s nothing Violetta “Six” Salvitto won’t do for her friends. She doesn't need anyone to save her. In fact, she's been trained since the age of twelve to handle any trouble that comes her way. But when her handler suddenly decides she needs some backup, she discovers that wanting help, and the man who provides it, is an entirely different question.