In reply to Ron Dawson, not only did Enya produce the music for the series
the Celts but she also has two solo albums currently available, which are tid
Watermark(1988) and Shepherd Moons(1991). Further to this there is also a
video available called Moonshadows(1991) which contains five of her songs.
All the above can be thoroughly reccommended listening as some of her songs
are sung in Irish and the better for it.
I hope this answers any queries you may have had about her music.