Diary of Murder — Jean Henry Mead

In this second novel in the Logan and Cafferty mystery/suspense series, sassy boomer sleuths Dana Logan and Sarah Cafferty brave a Rocky Mountain blizzard in their RV to investigate Dana's sister's sudden death in Wyoming. Dana's brother-in-law claims it was suicide but the two women set out to prove it was murder. The case is complicated because the small town sheriff is his brother, the coroner his cousin, and Dana's sister is scheduled for cremation the following morning. Placing their own lives in danger, Sarah falls victim to possible poisoning and is hospitalized. Dana carries on alone with the help of a DCI agent she falls in love with as more bodies turn up and a vicious drug ring is uncovered.