The Legend in Green Velvet — Elizabeth Peters

Susan had been infatuated with everything Scottish for as long as she could remember. When she arrived in Scotland to work on an archaeological dig, she thought it was a dream come true. But now the dream was rapidly becoming a nightmare.

She had no idea why a sinister soap box orator slipped her a cryptic message. Or why he was chasing her through the streets of Edinburgh. So when Jamie Erskine, a young Scottish laird came to her rescue, she was very grateful.

Before they could say Mary Queen of Scots, Susan and Jamie were being pursued by the police who wanted them for murder. And by someone who was intent on murdering them....