The Nemetonum Society faces an even greater threat than before and once again the secret of the Gwydion Stones is challenged by foes that strive to possess their awesome power. From across the barrier of the inter-dimensional void the survivors of Atlantis strive to return to Earth while in England the remnants of Marcus Wolffs operation regroup and return to the attack. In the midst of these new threats, Hannah Chappel-Jones discovers an even more incredible secret, one her family have kept for over a century that sheds light on the very origin of the stones themselves. With assailants on all sides, the Society struggles to defend the stones against the most powerful threat they have ever faced. In their darkest hour of need, can they find help in the most unlikely of places and can they stand up to the Warriors of Atopia? The Warriors of Atopia: the sequel to The Gates of Atopia.