Atoll is one of the most renowned bands that came from France and is also the only French band that had an English vocalist in its lineup (see above). Atoll released five studio albums in all, and "Rock Puzzle" is their fourth. As far as I can remember, this is their only album that features a symphonic orchestra.
While Mandrake Memorial's second LP (Medium) had moved them in a more self-consciously progressive hard rock direction, their third and final album went somewhat off the deep end in that regard. There was little left of the song-driven psychedelia of their first and best album, and what had replaced it came close to drowning in an inchoate blend of late psychedelia and early progressive rock. There's much apparent ambition on this record but little coherence, alternating semi-improvised-sounding noodly instrumental passages with not-so-great songs and positively weird swells of operatic doomsday voices and cinematic electronic rock.