The crucible / by Peter King.

"As the community attempts to close down the mystery of the Renwick fire and resettle on Earth their enemies move quickly capture them. Only when it becomes clear they are planning to release a deadly a influenza epidemic do the Changels realise flight is not an option. Everyone, including Sue, must commit everything to prevent a massive plague. But that means a fight some will not survive" --Publisher description.

Novel for young adults.

Edition 3.