The Sinclair BetRayal: A Jayne Sinclair Genealogical Mystery – M J Lee

Description:

In the middle of a war, the first casualty is truth.

For years, Jayne Sinclair has avoided researching her own family history. There are just too many secrets hidden in the past. Then she is forced to face up to the biggest secret of all; her father is still alive. Even worse, he is in prison for the cold-blooded killing of an old civil servant.
Was he guilty or innocent?
Was her grandmother really a spy during World War 2?
And who betrayed her to the Germans?
Jayne uses all her genealogical and police skills to investigate the world of the SOE, and of secrets concealed in the dark days of the war.
A world that leads her into a battle with herself, her conscience and her own family.