This uncommon book is a journey of discovery in the truest sense of those words, a journey to unseen inner worlds. Mario Mantese's thorough investigation of internal frontiers and parallel worlds are depicted here, and the reader is awe-struck by his extraordinary sensitivity and his almost unlimited spiritual capabilities, and how he employs them to cross over secret invisible boundaries. What he saw, experienced, and had to endure is fascinating and simply inconceivable for the human intellect. His contacts with various masters and the manner in which these events occurred are deeply touching and invite the reader into unfathomable depths of our existence. This book is certainly one of the most unusual autobiographies ever to be published in the field of spiritual literature.