Fleeing from the murderous brigand Sandino, Matteo - a young boy - is saved from drowning by the companions of Leonardo da Vinci. From this moment on, Matteo is at the Maestro's side as he carries out his work, which ranges from the painting of magnificent frescos to intricate dissection of the human body. And as Da Vinci and Matteo travel across Italy on the Borgias business, murder, deceit and revenge follow. For Matteo carries with him a secret that both the Borgia and Medici families would kill to obtain. A life-changing secret that must, finally, come to light for all to see... A gloriously rich and authentic story of the Renaissance, THE MEDICI SEAL is also both the personal story of Matteo, a boy becoming a man, and a fascinating glimpse into the world of Da Vinci.