What you have before you, for the first time in English, is a reformational jewel by the Spanish reformer Cipriano de Valera (1531-1602). In his Treatise (1594), originally written for those protestant believers enslaved by the Barbary pirates, or corsairs, Valera masterfully comforts, exhorts, and edifies, while providing a deconstruction of Roman Catholicism, Judaism, and Islam. Perhaps most remarkable is his encouragement to those faithful held...