It is a mystery and detective book. Since this volume was written an epoch making invention has been announced to the radio world. It is the super-regenerative system developed by E. H. Armstrong, the wizard of Columbia University. This system is bound to revolutionize the art of wireless communication in every branch, and is in itself the most important discovery since Marconi put into operation the first crude form of wireless apparatus. I am mentioning this fact because there is the romance of youth overcoming every obstacle placed before it tied up in the history of Armstrong’s remarkable achievements, and the story of this romance should stand forward as an incentive to American boyhood.
