Henry Jaegers

Henry Jaeger was a German author and former criminal best known for his semi-autobiographical debut novel *The Fortress* (*Die Festung*, 1962), which he wrote while imprisoned. Born Karl-Heinz Jaeger, he later became known for novels and crime writing after his release from prison.[1][2]

Frankfurt am Main, Germany Jun 29, 1927 Wikipedia
autobiographical fiction crime fiction novel