In 1958 Gavin Gibbons wrote a children's science-fiction novel By Space Ship to the Moon, which featured a UFO landing on Moel Sych in the Berwyn Mountains of North Wales. Sixteen years later, in a surreal case of life imitating art, those very same mountains would again be the focus for a story involving a downed UFO. But this time, some said, the story was for real.