Soterion Mission -- Paperback / softback

In a post-apocalyptic world where no-one lives beyond their teenage years, the mysterious Roxanne arrives in Cyrus's village, fleeing the barbaric Zeds. She claims to be on a mission that can save them all, but can she be trusted? Cyrus joins her in her quest for the legendary Soterion, but the Zeds are determined to get there first.