On their ninth space flight with the Martian pilot, Vargo, Professor Lucius Brane, Tiger Clinton, his son Rex and Toby Paul visit the happy planet of Krona. Their timely intervention saves the inhabitants from unscrupulous space-invaders from without and another deadly peril from within. Children's book club edition The children's book club London The characters in this book are entirely imaginary and bear no relation to any person living or dead Copyright 1962 by Captain W. E. Johns Illustrations 1962 by Hodder and Stoughton Ltd This edition by arrangement with Hodder and Stoughton Limited Printed in Great Britain By C. Tinling and Co. Limited, Liverpool, London and Prescot