Teenagers Zach and sister, Rachel, live on a farm in the Yorkshire dales. Their preferred leisure pastime is potholing. A fine spell of dry, warm weather has exposed a new labyrinth and the temptation to explore cannot be resisted. They did not expect to discover an alien the survivor of a probe which landed on Earth many years ago. The alien befriends them and wishes to pass on his formidable powers to the siblings before his energy dissipates.
Romney Hole
Author: Wallace E. Briggs