Bob Morane

Bob Morane is fishing with Bill and Professor Clairembart when they are stopped by Captain Graigh and his time patrol. Graigh asks them to do research on the Muvian people who inexplicably disappeared from Earth 10,000 years ago. Bob travels back in time with his friends. They discover that the advanced Muvian people have nuclear weapons that have fallen into the wrong hands. Zelgund, a half-brother of Princess Taima, has used them to bomb the kingdom. Only the princess and a few loyal subjects were able to find safety in a building of crystal towers that offers protection from the radioactive radiation. But will this hiding place withstand a second attack?