"We take the greatest pleasure in presenting this latest and best work from the pen of William Walker Atkinson. It embodies the essence of years of thought, study, and experiment on the part of its author whose original research, discoveries, and writings along these lines have given him his worldwide reputation as an authority. It is his Masterpiece. A portion of its material was used in two of the author's previous works, vis., "Mental Magic," and "Mental Fascination," both of which works were published by ourselves. Both of the said works are now practically out of print, and will be withdrawn from sale by us, as they will be superseded by this newer and more complete work. This foundation material has been edited; added to; changed; improved; and corrected by the author, in accordance with his increased experience and knowledge of the subject. Obsolete matter has been replaced by entirely new material, and the work is now strictly "up-to-date". It is encyclopaedic in extent and character, every phase of the subject being considered by the author and expressed in words charged with his dynamic vitality. It contains matter that well might have been expanded into several volumes"--Foreword. (PsycINFO Database Record (c) 2011 APA, all rights reserved).