Guinness, Os., Unspeakable : facing up to evil in an age of genocide and terror / Os Guinness. - first edition. - [San Francisco] : HarperSanFrancisco, (c)2005. - xiii, 242 pages ; 24 cm. LCCN: 2004054032 Subjects--Topical Terms: Good and evil.Good and evil--Religious aspects--Christianity. LC Class. No.: BJ1401 / .U577 2005 BJ1401