Vineyard Secrets

http://www.wendyvanhatten.com/wendysbooks/vineyardsecrets.html
As she lay dying, Marta’s grandma warns her to be careful. The only problem is, Marta doesn’t know what she means. Then, people turn up murdered all for a piece of art…and Marta still doesn’t know how or why her grandma is connected. It takes a trip from San Francisco to Venice to figure out what’s going on. After all, Marta’s grandma knew about the secrets in the vineyards…or did she?