The Unraveling of Julia — Lisa Scottoline

Julia has already had enough heartbreak and grief to last a lifetime. After losing both of her adoptive parents, Julia finds herself completely alone after a devastating event leaves her widowed in the brisk Brooklyn night. When a letter shows up at her door informing her that she's inherited a villa and vineyard in Tuscany along with a small fortune by a mysterious benefactor, Julia jumps at the chance for a new future.
 
Emilia Rossi, Julia's benefactor, is an alleged descendant of Duchess Caterina Sforza from the Italian Renaissance who bears an uncanny resemblance to Julia herself. With the hope of learning about her potential biological family, Julia digs into the lives of both Emilia and Caterina, finding eerie and tragic parallels between her life and Caterina's. The more she investigates, however, the more she and those around her are put in harm's way.
 
What Julia learns will put her in the crosshairs of a dangerous conspiracy and expose the truth of her own identity, changing her life forever â€" if she survives.