"Sleeping Sun" contains four ballads and to my opinion, the best ballads that Nightwish has recorded. The EP opens with the single "Sleeping Sun", a gentle, calm but beautiful song. The second song is my personal favourite: "Walking In The Air". It is so dreamy and really makes you want to 'walk in the air'. The thirth song is "Swanheart", a very emotional piano-ballad which shows that Tarja really can sing. The last song is "Angels Fall First", taken from the debutalbum which has the same name. This is the most emotional song on the EP, it's simple but very beautiful.
All of the songs on this EP can be found on other Nightwish-albums but it's still worth buying it (especially for fans), because it's a good album if you're in the mood for something calm and emotional. It's not just a random collection of soft and regular slow song, but a great selection of Nightwish's best ballads!