This book was by far the easiest to understand, and most well written treatise on the subject of astral projection I have read thus far. It lays out it's information in an easy to follow, well structured way, as to not overwhelm the reader, whilst conveying the necessary and pertinent information clearly and effectively. It is well deserving of it's many 5-star reviews; and as for it's 1-star reviews, I feel I must shed some light on this matter.
Many of them (the negative reviews that is) are written by the same person; a rival "author" who goes by Sapphire. This individual is infamous on Amazon for writing all of his own reviews, as well as writing negative reviews for competing books. He has many fake identities which he uses on Amazon, including: "A. reader"/"Astral Reader", "Mark", "William Broderick", and about 30 others. He has very poor understanding of English grammar and syntax, which is painfully obvious in many of the self-written 'reviews' for his books, as well as in his books themselves. As some of us began to catch on to the fact that most of his reviews were written by the same person, he changed his tactics to include blatant plagiarism; where he would simply cut and paste from other authors' reviews to hide his terrible grammatical skills. I verified this treachery by simply Googling a line from one of his grammatically correct reviews; and to my surprise, it came from another review right here on Amazon, for a book on astral projection no less! Sapphire not only writes only 5-star reviews for himself, but he deletes any review which threatens to either A) expose his terrible 'books' for what they are; or B) expose his dishonest reviewing tactics. I am not the only person to realize this however, and if you desire proof, you can view the Amazon product forum discussions for "Successful Astral Projection to the Space and Universe", by Sapphire. Click on "See all discussions", and there you will see a hilarious back-and-forth between the actual readers and some of Sapphire's fake identities. Thankfully, Sapphire cannot delete forum discussions as easily as he can delete bad reviews!
Apparently Amazon has no interest in stopping this conman's dishonest and immoral activities, however, when I see that a great book like "Mastering Astral Projection" is getting an increasingly poorer rating; and I know that this is mainly because of an endless barrage by some jerk's fake reviews; I can't help but try to do something. Robert Bruce is an outstanding author, as demonstrated in "Mastering Astral Projection" as well as his previous book, "Astral Dynamics". I guarantee that if you read either one, you will not be disappointed.