An anonymous Soothsayer has written to Rome suggesting that Leonardo da Vinci has encrypted a secret, blasphemous message in his painting The Last Supper. Father Agostino Leyre. An Inquisitor and expert in cryptography is dispatched by the pope to the monastery of Santa Maria delle Grazie to decode the painting. Should he succeed, de Vinci will face trial for heresy and certain execution.
Simon & Schuster