Lori Ryder and the City of Crystals

Set in London, the story follows Lori Ryder and her best friend Amanda, who brings a magical crystal sphere that allows for travel through a tunnel of rainbow water to the secret City of Crystals. This ancient city, guarded by wise tribes, is a place for learning, healing, and decision-making among various civilizations. As they encounter extraordinary beings and organic technologies, they must also protect the sphere from a mysterious antagonist who pursues it for his own motives, leading to an adventurous chase across multiple countries.