There is only one song of the album available and I think the whole album should be available to hear.
Spotify tries really hard to get music available on their service, but in the end the availability of music on Spotify is up to the artist and their music label.This thread by Spotify staff explains why some music is not available:https://community.spotify.com/t5/Content-Questions/I-want-an-artist-song-on-Spotify/td-p/1136005
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