First one is Killer in King's Cove. In 1946 Lane Winslow has moved to a small town in British Columbia to start a new life. During the war she'd been something of an operative, not quite a spy, although she periodically went behind the lines in Europe. The man she'd loved had died in a plane crash in 1943, her mother died when she was a child, she's estranged from her father. So moving to Canada seems like a good idea. She is settling into this small community, when a body turns up in the stream that is her water source. There's no identification, just a piece of paper in a pocket with her name on it.
I have read the first three books so far, which include Death in a Darkening Mist and An Old, Cold Grave. I have the next four on order through a local bookstore.
What's best about the books so far is the isolated, small town feel of them. King's Cove is itself a fictional place, apparently based at least somewhat on a small town Iona lived in as a child. There's also a decent sense of the time, the late 1940s, the lingering influence of WWII. Plus the ghost of The Great War hangs over this place. Only two decades separated the two wars, making the first one far closer to the people of 1946 than Vietnam is for us. More like the first Gulf War to now.
Oh, and I went to high school with Iona.