Over Diamond Bar: The Clash of the Immortals is a juvenile Christian fiction novel by Tammy Hilt Rivera that tells the story of sisters Crystal and Silver as they seek their missing brother, Joshua. After their cousins come to live with Crystal and Silver for the summer, they use a secret key of faith to transport themselves to the invisible heavenly realms where Joshua is being trained in spiritual battle. Together, the siblings and cousins join together in training for a battle that will determine the future of Diamond Bar-and their souls. In Over Diamond Bar: The Clash of the Immortals, fantasy, science fiction, mystery, adventure, and humor are combined into a Christian fiction novel for young adult and juvenile readers that will encourage young Christian readers in their faith with an unforgettable story. Juvenile Christian fiction; young adult Christian fiction; young adult fiction; juvenile fiction; Christian fantasy.