The Loop by Ben Oliver

Luka Kane has been inside hi-tech prison the Loop for over two years.

A death sentence is hanging over his head but his day-to-day routine is mind-numbingly repetitive, broken only by the books brought to him by the sympathetic warden, Wren. Then everything starts to change: rumours of war are whispered in the courtyard and the government-issued rain stops falling. On Luka's last, desperate day, Wren issues him a terrifying warning: breaking out of the Loop might be Luka's only chance to save himself – and the world ...

The first nail-biting instalment in The Loop trilogy: a must-read YA series for teens and adults