Study & Concentration with Reveen Cassette Tape (Excellent Condition). $5. Close to VGH in Vancouver. This original tape is by the man they call Reveen , the world famous Vancouverite Hypnotic expert in Hypnosis and suggestive therapy. * For students, salesmen, or corporate executives; * Develop an interest in your work, learn to concentrate, learn while you sleep, gain confidence during examinations and in your leadership.