David Thomas edits and translates Abu Isa al-Warrags Against the Incarnation, the second and last part of his Refutation of the Three Christian Denominations. The book contains an edition of the Arabic text alongside the English translation, together with explanatory notes. Dr. Thomas' comprehensive introduction outlines the pluralist and multifaith society of medieval Baghdad, placing Abu Isa in the context of both Muslim theological argument and Christian-Muslim discussions. Thus he succeeds in demonstrating the author's originality and his influence on later Muslim authors.