Noticed that
Mr. Churchill's Secretary, by Susan Elia MacNeal, is currently on sale for $1.99.
This entertaining spy thriller about a young woman working for the prime minister in the early days of WWII is the first of the Maggie Hope series. I just happen to have finished listening to the audiobook version yesterday, and enjoyed it very much. Maggie is a likeable heroine, and there's a lot of nice period detail and an interesting plot.