In the years 1914 to 1922, James Padgett received some 2,500 communications including over 200 from Jesus of Nazareth, and an even greater number from his apostles. If your interest is why we are here, what we should be doing, and what difference it will make for those that do, and those that don't, this is the book to answer the questions.
If one is looking for a short description of what this book is about, one might term it a "Philosophy of Progression." From a spiritualist perspective, it goes into great detail about the next realm, and how one can progress from sphere to sphere, and what the major differences are between each sphere. Looked at from a different perspective, it is a careful review of orthodox Christianity, pointing out where this is based on misunderstandings. One could indeed claim that this work is Bible based, but it's not the explanation you will hear in church.