Blood On the Vine was an absolutely perfect suspense thriller. It was a police procedural which I love. It featured an FBI agent forced to return to Napa to investigate the murder of two young women – a place she swore she would never return to because of a teen age trauma, and a loveable and funny police detective who was new to the job but at 60 years old was full of wisdom and insight. Also front and center were feuding families, a possible cult based on ancient writings where drugs, wine and sex were the norm, and a fascinating look at the science of wine making. You will definitely be hooked by the prologue and will be fooled more than once as you try and figure out who killed Catherine and why.