内容简介：
Every one knows that Germany is famous for her spy system. Scarcely a land on earth but is, or was, honeycombed with the secret agents of the German Government. Ever since this country began to send war munitions to the Allies an organized band of men has plotted and schemed against the peace and welfare of the United States. When America itself declared war their efforts naturally were redoubled. Our Secret Service has been wonderfully efficient, but it has not been humanly possible to apprehend every spy and plotter at once. It is a big task to unravel all the secrets of this great German organization. We are at war with Germany now and it is the duty of every American to help his government in every way he can. This book is the story of how two boys, too young to enlist, did "their bit" right in their own home town. It is not an exaggerated tale, but presents in story form what has actually happened all around us. Due allowance is made for the fact that the most of our citizens of German birth and descent are good Ameri-cans. No one whose motto is, "America First," need fear offense from anything contained in the story of "Bob Cook and The German Spy." Two boys loved their country and did their duty by it. May we all do as well.