In a post-apocalyptic world, Lina and Doon have led their people out of the darkness of their underground city into a bright new world full of colour and life.

They are accepted by the people of Sparks, one of the small communities living on in the post-Disaster world.

But, as time goes on, the people of Sparks become reluctant to share their precious resources with the pale strangers - and misunderstanding threatens to grow into resentment, hatred and violence.

Exciting sequel to The City Of Ember.