Biosphere - Substrata (1997)
I was already familiar with his debut Microgravity but this is a lot more enjoyable. While Microgravity is more in the vein of ambient house, Substrata casts aside the beats and goes for a straight ambient sound. The music (in particularly the use of space) immediately invokes a wide-open glacial environment where the air is cold and fresh, just like the album art. If you like ambient music this is essential.