In dark times, out on the stormy sea, magic is not the safest thing to cling to, but it is all there is. David and Laura no longer have the Golden Key and cannot return to their own time. They find themselves in the year 1588 in Spain which is ruled by the fanatically religious King Phillip II. Their only chance of returning home is to find a magical golden crucifix. But it is dangerous to search for sorcerous gold in a time where heretics and free thinkers are tortured and burned by the Inquisition. Will the twins be able to escape the claws of the king and return to their parents alive? The King’s Crucifix is the third novel in the trilogy about the Keepers of the Key, where the twins David and Laura have embarked on a journey filled with riddles, prophecies and magical artefacts that open doors to worlds they had no idea existed.