The Spies of Hartlake Hall by R.L. Graham
My rating: 4 of 5 stars

1917 A body is discovered in a locked room, with a telegram from the German Foreign Ministry. Patrick Gallagher of the British Secret Service, is called in to investigate, and so the possible suspects are invited to his family's current home, Hartlake Hall. Then it gets complicated.
An entertaining and interesting well-written historical spy mystery with its cast of diverse characters.
An ARC was provided by the publisher via Netgalley in exchange for an honest review.

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