Because it is in My Blood (Gabrielle Zevin Birthright Trilogy)

Freed from jail, Anya hopes that things will get back to normal. But life on the outside is even more dangerous than life behind bars. Some of her gangland family want revenge for the crime for which she has done time: the shooting of her uncle.

Forced to flee the country, Anya hides out in a cacao plantation in Mexico. There she learns the secrets of the chocolate trade, a trade that is illegal and deadly in her native New York. There too she discovers that seemingly random acts of violence carried out across the world have a single target: her family. As innocent bystanders get caught in the crossfire Anya must act fast and decisively to stop it, no matter what the danger to herself.