Line of Darkness: A Colleen Hayes Mystery, Book 4 (Unabridged‪)‬

San Francisco, 1979.

When ex-con PI Colleen Hayes is hired to find a missing person, she discovers an international vigilante group hunting down ex-Nazis. A World War II banknote and a 1942 SS ID of a German officer long thought dead lead her to Italy, where she uncovers a secret project hatched in a concentration camp. Colleen has no choice but to push ahead if the killing is to stop and justice prevail.

Perfect for fans of historical and international thrillers.