They Used Dark Forces

They Used Dark Forces is the final part of Gregory Sallust's wartime experiences. In this novel Sallust is sent to investigate rumours of a German superweapon being built in Peenemünde. He is wounded following an air raid and encounters Ibrahim Mallacou, a Jewish Satanist who uses hypnotism to relieve his pain whilst treating his injuries. He encounters Mallacou again when he is trapped in Poland attempting to smuggle out parts of a V1 rocket. After several adventures including imprisonment and dinner with Hermann Göring the unlikely pair find themselves in Hitler's bunker during the siege of Berlin where they attempt to persuade him to take his own life rather than fight on.