The Secret Supper by Javier Sierra
'I cannot recall a more dangerous and tangled puzzle than the one I was called upon to solve in the New Year of 1497...' An anonymous Soothsayer has written to Rome suggesting that Leonardo da Vinci has encrypted a secret, blasphemous code 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, da Vinci will face trial for heresy - and certain execution. Full of dark surprises, The Secret Supper depicts a deadly game of wits between the brilliant Leonardo da Vinci and the man intent on uncovering the shattering secrets behind one of the most famous Christian masterpieces.