In this book, Dr. Cooper and his kids visit the island mission of a missionary by the name of Adam McKenzie. However, it seems that things are amiss on the island. Their friend has become a patron of local myths and superstitions, and become involved in native rituals. Dr. Cooper is suspicious, and carefully investigates. What he encounters is not at all what he expected! With his life, his children's life, and island parishioners' lives at stake, the Coopers must all rely on Christ to help them Escape From the Island of Aquarius.
For the parents: This book doesn't contain as much death-and-skeleton type creepiness, but some more bizarre events that before. Still, as I said in my other reviews, I read them as a child, and loved them. I'd recommend them for any kid 10 or older.