Six On The Moon
by Stenton Garvald
Jack was determined to find another mystery to solve - after all, that was what he and his secret friends did best. But perhaps a space adventure wasn't quite what he had in mind, with Aliens, a Death Ray, a Mad Professor (actually their friend Professor Fletcher, who was more Confused than properly Mad), Lost Continents and a Rocket Ship. Still, it should keep Eric and Roy happy ...