The Letter

This is an Apple Books audiobook narrated by a digital voice based on a human narrator.

Would a mysterious letter pinned to your front door alter your life? What if it set in motion a chain of events leading to the discovery of a hidden underground city to search for a secret artefact that has lain hidden for almost six hundred years? An artefact that holds the truth to the origins of earth's civilisations that the Catholic Church wish to destroy. Would you be curious?