While this book is liberally sprinkled with quotes from true Sufi masters, and while the author clearly understands many aspects of Sufi tradition, I wish the book had been titled and marketed for what it is: A metaphysical fantasy that interweaves colorful allusions to Sufism without embracing what I, at least, understand to be at the real heart of the tradition. The Master of the book is basically Gandalf in Sufi drag. I have nothing against Gandalf, but Sufism, quite notably, does not rely on concepts of the supernatural for its mysticism. Rumi and Hafiz, for instance, were clearly not supernaturalists, but rather much more akin to Advaita non-dualists, or even Buddhists, interested in paring away everything that keeps us from perceiving the presence of the Friend (or Buddha nature)in our very midst. I far prefer Gandalf to the Master in this book, because considering and enjoying Gandalf does not require or lead me to ask questions like "In a world where Islam (and thus Sufism) is widely misunderstood, why is this author casting yet more obfuscation on these great traditions?" The Master is within, but you would never suspect that from this book (again, the hierarchical metaphysics of Tolkien are much more straightforward: Frodo may become a great hero, but he can never be a wizard, much less Gandalf). This book is indeed entertaining, so I was reluctant to give it less than 3 stars, but I wish it had been marketed for what it is, a kind of quasi-Muslim version of Da Vinci Code, distorting Muslim tradition to about the same degree that Brown's book distorts Christianity. Basically, the book achieves its effects by mixing Sufi ideas (ideas that become increasingly banal, taken out of their historic and cultural contexts) with motifs from 1,001 nights (especially the motif of Jinns sealed into vessels through the agency of Solomon's seal). Starting the book, I thought it had great promise, but I came to hate it by the end.