Pinnacle of the trilogy with RCA after '' Heaven and Hell '' and '' Albedo 0.39 ''. Vangelis offers us with '' Spiral '' a wonderful job when stimulating blend sonorities (Spiral - Dervish D) and more sober (Ballad). But the title Master of the album is the well-known, if not immortal, '' To the Unknow Man '' (Vangleis would not Evzones inspired to compose this title). Too bad this album ends with a fade '' 3 + 3 '' with passages' vibrato-bleating '' not very harmonious. But overall, despite its age, is still worthy of a genius. Less successful than Albedo 0.39, but easier to listen to.