La llave maestra

Philip II lays on his deathbed, his hand clutches a fragment of parchment covered with mysterious inscriptions, with his last breath he whispers ?The Master Key?. This fragment, one of twelve that together hold the key to the most enigmatic secret in the history of time, is discovered by Raimundo Randa, a top agent in the feared network of the King's spies. The discovery will plunge Randa in an epic odyssey to locate the remaining fragments and unlock the mystery they hide ?an odyssey that will be repeated five centuries later by a young cryptographer by the name of David Calderon.