The Oort cloud is an attempt by the author (Marvin Dixon, also the author of Balance and Control) to explain the complex nature of the universe, man's place in it, the limitations of space travel, dimensional space and the universe's grand design, the notion of dark matter and dark energy, intelligence and the life force within the universe as well as the existence of God and the concept of religion. And while much of the discussion is thoughtful and well-reasoned, in the end, because the author is limited to the confines of the Oort cloud and his own three dimensional existence and intellect, he acknowledges that he is only able to prove his own existence and the existence of God; everything else is based upon theory and supposition. Though realistically, when we get down to the nuts and bolts of cosmology, all any of us really have are our theories and concepts. Verifiable proof of anything beyond our theories will have to wait until we can create new and different sciences. It is a fascinating read.