A scientist has disappeared and the knowledge and information he has can end the war in Europe or end the WORLD. It depends on who ends up getting the suitcase he had with him. Not only do the English want it back, but they wish to keep it out of the hands of both the Germans AND Dr. Fu Manchu. So, of course, the military get Nayland Smith on the case. With his friend Dr. Petrie he must find the scientist, Professor Brooker, stop the Si Fan from getting the secret of the Midnight Sun, and even deal with a Zeppelin. Who will end up with the secret? A secret that could destroy a city over night, with all the millions inside! A delight to read and a fast page turner!