Black Cross by Greg Iles

The development of poison gas for use against the D-Day invasion is the core of the book. The fact that the development occurs in a concentration camp provides an enormous amount of pathos.   McConnell and Stern, an unlikely duo of pacifist and Jewish activist are chosen to derail the production of the gas.

My own father served in WWII in an army chemical company.  Their job was to respond with chemicals if the Nazis used them first.  This story resonated with family history. 

Iles is a master of character creation.  He provides subtle nuances that engender his characters with body and spirit.  In addition to his characterizations, he cultivates an intricate and complex plot. 

Much of this book was horrific but it was captivating.

I highly recommend it. 

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