I came accross this book accidentally - or it came accross me, with an existing interest in philosophy & non-dualism.
Many of the ideas contained in the book are similar to those found in New Age reading and Eastern philosophy; everything in motion, opposites, vibration, you are not the body. There are also some very great differences,and the book is aimed at the magic/manifestation/power end of spiritual belief.
I have only rated with three stars because the book is written in such a strange way; neither well pitched to readers completely new to the philosophy, or to those familiar with some of the ideas. For example it is quite taken for granted that the reader is not body-identified, and other concepts are breezed over with statements along the lines of 'but we shall not expound upon that here'. In other places the detail is there, but without any explanation for how it is so, or how the concept relates to the teachings.
It came accross as poorly written - over punctuated & capitalised and inconsistently swinging from philosophical argument to great presuppositions. I appreciate that some of the style may be of a particular period, and initially I found it quite charming. Here are a couple of sentences from the book showing the style to expect when reading this book:
"There is one more matter of which we desire to speak in this lesson, and that comes very near to an invasion of the Metaphysical field of speculation, although our purpose is merely to show the futility of such speculation."
"At the last, THE ALL is All Reason in Itself; All Law in Itself; All Action in Itself--and it may be said, truthfully, that THE ALL is Its Own Reason; its own Law; its own Act--or still further, that THE ALL; Its Reason; Its Act; is Law; are ONE, all being names for the same thing."
My conclusion is that as an introduction to ideas and concepts it is not an accessible read. To an experienced reader of spiritual philosophy it holds few new ideas. But if you have no expectations and can enjoy the writing style, it is an interesting short read.