McPherson, Catriona, 1965- Dandy Gilver mystery #16

Series numbering from Goodreads.com

"War is hovering on the horizon, and Dandy Gilver wants nothing more than to keep her friends and family close. But then a call in the night places her oldest friend Daisy at the centre of a murder investigation. With her friend's future on the line, Dandy and her fellow sleuth Alec Osbourne must race to prove her innocence. But when they reach the idyllic Scottish village of Dirleton, residents confirm a woman was seen at the crime scene - an ancient stone called the louping stane, still spattered with the victim's blood. And the longer the detectives spend in the village the more they question Daisy's involvement. They're not getting the answers they need, but are they asking the right questions?"--Publisher