Shadow Blessed by D.K. Holmberg (2016) CreateSpace

A girl gets separated from her parents in a foreign city while playing a game of following and being followed.  Her parents are brutally killed and she, as a stray, must learn to use her sills to steal coin purses from unsuspecting tourists.  But her skills go beyond thievery and there are those who search for her.  She does not trust people and that helps to keep her safe, mostly.