The Silver Chalice (The Anouka Chronicles)

William and Belle Joy are privy to a ghostly apparition in church. The apparition is stuck in time, unable to reach home. William and Belle are determined to help this pallid little girl escape the clutches of Anouka, the parallel universe in which she appears to have found herself, but it is a mystery as to why she cannot pass back into her own world. The secrets of the Silver Chalice start to reveal why, and William begins to discover that if he does not play by the rules, Janet may never return home and his own entire existence may also lie in jeopardy.