Sting - The Dark Legend Dossier, #4

After unmasking corrupt corporation NIRA, Will and his friends set out to discover the reason why they orchestrated the recent civil war and played the remains of humanity against each other. When their mission goes wrong and they are captured, they find themselves thrown into the last place Will ever wanted to find himself, the post-apocalyptic hell he grew up in, the other Worton. As they search for a way home, and with the sky turning a strange colour, they soon discover that the place is not quite as dead as they thought it was.
There is life beyond the end of the world...