"Holy Horrors" chronicles the grim spectrum of religious persecution from ancient times to the present, including such historic massacres as the Crusades, the Islamic jihads, the Catholic wars against heretics, the Inquisition, witch hunts, the Reformation, and such atrocities as the Holocaust, the seemingly insoluble Catholic-Protestant schism in Northern Ireland, religious tribalism in Lebanon, and the barbaric cruelty of the theocracy in Iran. The antique woodcuts, paintings, prints, and contemporary photographs that illustrate the book are at once gruesome and riveting.