Freud's last book is a multi-layered attempt to reconcile his trademark theories on religion and psychosocial development with his own identity as a Jew. It was written partly in Austria, as the Nazi movement picked up speed, and finished in London where the author found refuge.
The essays join together the main ideas from "Totem and Taboo" and "The Future of an Illusion" in a study of the Jewish (and Catholic) founding texts. He believed the biblical Moses to be an Egyptian, who imposed his failed religion on a wandering tribe nearby. The Oedipus effect ensued, leading to collective repression. Thus, widespread belief in one god is a symptom of our repressed guilt for having murdered Moses thousands of years ago. Through it all, you can hear the author's voice, desperately attempting to grasp what it really means to be one of the chosen people of Moses during the Holocaust.
If you liked this I would highly recommend:
Things Hidden Since the Foundation of the World - René Girard
Erotism - Georges Bataille