If you like that book, I'd recommend The Law of One if you are not already familiar with it.
Also channeled material, and likewise a very interesting take on the structure of reality. Many similarities with Urantia...
What, you ask, was the beginning of it all?
And it is this...
Existence that multiplied itself
For sheer delight of being
And plunged into numberless trillions of forms
So that it might
Find
Itself
Innumerably.
-Sri Aubobindo
Saidin is a fictional character, and only exists in the collective unconscious. Therefore, we both do and do not exist. Everything is made up as we go along, and none of it is real.