Il Santo e la Spada, by Cecilia Penati (2011, Italy)

Giovanna is a beautiful girl from Milan, moving to Vilminore in order to work in the library. But, throughout the diaries of the just passed by general practitioner, she starts investigating on a crime of 50 years before, eventually with Andrea, a fascinating young guy living there. Engaging, turn-pager, deep... Soooo good!