The Last Kabbalist of Lisbon (The Sephardic Cycle #1)
Richard Zimler

One such secret Jew was Berekiah Zarco, an intelligent young manuscript illuminator. Inflamed by love and revenge, he searches, in the crucible of the raging pogrom, for the killer of his beloved uncle Abraham, a renowned kabbalist and manuscript illuminator, discovered murdered in a hidden synagogue along with a young girl in dishabille. Risking his life in streets seething with mayhem, Berekiah tracks down answers among Christians, New Christians, Jews, and the fellow kabbalists of his uncle, whose secret language and codes by turns light and obscure the way to the truth he seeks.