The last five books in the series.
The Vernon CaseJanet Markham doesn't like coincidences. When she and her sister Joan spend a day running errands and she keeps seeing the same man everywhere, it worries her. When that same man nearly dies of a drug overdose, Janet is even more concerned. Another drug overdose worries her even more. Is someone in Doveby Dale, the village the sisters call home, dealing in drugs? Can Janet help the local police...