Summary:

From the first chapter: 'Why does not some mental efficiency specialist come forward and show us how to make our minds do the work which our minds are certainly capable of doing? I do not mean a quack. All the physical efficiency specialists who advertise largely are not quacks. Some of them achieve very genuine results. If a course of treatment can be devised for the body, a course of treatment can be devised for the mind. Thus we might realize some of the ambitions which all of us cherish in regard to the utilization in our spare time of that magnificent machine which we allow to rust within our craniums.'