Billy and Diana come across a dead body as they are on a walk on the cliffs of Dover. As you do. They end up having to solve the mystery. This involves Billy having to go to Yugoslavia to turf out an escaped POW.

Benn makes depicting this story and the twist and turns of the plot absolutely effortless. He is one hell of a writer. Because Billy has to gain a good understanding of how things work and what is going on to solve the mystery, we as readers do too. This includes the operational context. As a result we get deep insight into one or more aspects of WWII. This time it's code breaking, radio jamming and interception, the work of many Jewish people in the war effort, radar and other technology in air warfare, and finally, Yugoslavia.

The insights his story gave me help me understand the implosion of Yugoslavia after Tito's death. Benn renders this wealth of information engaging and enjoyable.

To sum up, as usual Benn gives us great characters, a proper interesting mystery against a fascinating background. I recommend this book highly. Thanks to Netgalley for an advanced review copy.