Spirits of Bone Island — Susan Stafford

This mystery novel, Spirits of Bone Island, takes place on the southernmost point of the United States. A hurricane is brewing off the coast of the Florida Keys. As the storm grows near, Liz and Maggie, owners of The Daydream Shop & Spa on Duval Street are trying to follow mysterious clues left by a murdered artist. Meanwhile another artist is killed. This time The Daydream Spa is the scene of the crime and the victim is a close friend.

While trying to find out who killed their friend, Liz and Maggie discover the spa has an unusual resident who is asking for their help. Liz and Maggie end up becoming involved with a local voodoo princess in order to help out/