O.K., to be honest, Andrew Lockington did not invent here the Soundtrack genre entirely new. We heard similar things occasionally. But nevertheless it is a catching piece of art, worth to listen to it with care.
The music itself is strongly symphonically influenced, in times with a decent touch of folk. The main theme is building up gradually over the entire length of the film, recurring several times. But you will have to wait for the very end, to enjoy it in full entirety. In this, the soundtrack follows nicely the run of the movie. As long as the protagonists are living in their subterranean refuge, which over the years has become more like a prison, the main theme is merely alluded to in several ways, but always stopping just before the wonderful musical culmination. It is only, when our search party reaches the surface of the earth and is experiencing a sunrise for the very first time in their life, that the City Of Ember-theme can be enjoyed in its totality for the first and only time too ("One Last Message"), thus reflecting the shared moment of liberation and relief to the notes.
Well, it's worth waiting for that, or you can right jump to track #24.
I would recommend the City Of Ember soundtrack to both, lovers of film-music as well as connoiseurs of the classical genre, or simply for people who like beautiful melodies.
But Warning: There is a good chance, that you will not be able to loose this catchy tune for some time !