It was suggested as a title by Binet's publisher, Grasset, instead of the "too sci-fi" working title Opération Anthropoïde.
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The novel follows the history of the operation and the life of its protagonists – Heydrich and his assassins Jozef Gabčík and Jan Kubiš.
4-H, a U.S. youth organization administered by the National Institute of Food and Agriculture