Operation Titan (Crossway Youth Book)

This is one of the Christian science fiction books that I devoured as a child. I re-read it in one sitting today and enjoyed it again. The story is set in a time when Christians are persecuted and must keep their faith secret. Christians have a secret world of refuge called Ekklesia. Paul Trentam is asked to rescue Church leaders from the colony on Saturn's moon Titan when information about them is stolen by a traitor. The pace of action picks up as things begin to go wrong during the rescue attempt. Though this book is from 1984, it isn't completely out of date in its projections of future science and I think pre-teens would still enjoy it today.