R. J. Anderson 
Quicksilver [PDF ebook] 

Back home Tori was the girl who had everything a sixteen-year-old could want-popularity, money, beauty. Everything. Including a secret. That secret made her very valuable. Now she’s left everything from her old life behind, including her real name and Alison, the only person who truly understood her. She can’t lose the secret. But if she wants to have anything resembling a normal life, she has to blend in and hide her unique talents. Plans change when the enigmatic Sebastian Faraday reappears in Tori’s life and delivers bad news: she hasn’t escaped. In fact, she’s attracted new interest in the form of an obsessed ex-detective now in the employ of a genetics lab. She has only one shot at ditching her past for good and living like the normal human she wishes she could be. Tori must use every ounce of her considerable hacking and engineering skills and even then, she might need to sacrifice more than she could possibly imagine if she wants to be free. The riveting companion to R.J. Anderson’s acclaimed Ultraviolet, which is now available in paperback.