- Riggs, Cynthia, Martha's Vineyard mysteries, 12th
- Deadly nightshade, Cynthia Riggs
- Jack in the Pulpit
- The Cranefly Orchid Murders
- Deadly Nightshade
- Bloodroot, a Martha's Vineyard mystery, Cynthia Riggs
- The Cemetery Yew
- Poison ivy, a Martha's Vineyard mystery, Cynthia Riggs
- The bee balm murders, a Martha's vineyard mystery, Cynthia Riggs