Incarceron

The descendants of the original inmates reside in the futuristic, hidden prison known as Incarceron, a desolate place riven by violence and competition. It is a terrible combination of medieval torture chamber features such as chains, huge halls, and dungeons, combined with modern tech elements such as a live structure that haunts the book like a spiteful, ever-watchful figure. Finn, a young prisoner, finds it hard to believe he was born and raised here and has disturbing glimpses of a past existence. The daughter of the Warden of Incarceron, Claudia, is imprisoned in the outside world in a future environment artfully designed to resemble a bygone period, and she is dreading her impending marriage. All she knows about Incarceron is that it exists. However, there comes a day when Claudia, outside the prison, and Finn, within, discover a crystal key at the same time. This allows them to communicate with one another. Thus, the scheme for Finn's escape is conceived.