Who remembers the last survivors of Muslim Spain, whom Spaniards contemptuously called Moriscos (“little Moors”)? Impressive research on them has appeared in the last 30 years, yet until now, none of it has escaped beyond the walls of the academic ghetto. Matthew Carr’s well-balanced and comprehensive book brings the story of their tragic fate to a wider public. “Blood and Faith” is a splendid work of synthesis. The story begins with the 10-year war — a crusade — to conquer the Moorish Kingdom of Granada. The Christian victory in 1492 signaled the beginning of the long ethnic cleansing of Holy...