The Great Library has long hoarded all the knowledge of the world, but a group of rebels has formed which continues to test its authority.
Jess Brightwell and his friends have fled London, only to find themselves imprisoned in Philadelphia, a city led by those who would rather burn books than submit. But Jess and the others hold powerful knowledge of a machine that would undermine the Library’s dominion. They will have to make dangerous allies and difficult choices to stay alive. The alternative is to be erased from life, and the history of the world, for ever.