After surviving horrific conditions in the Maze, Thomas is entrapped, along with nineteen other boys, in a scientific experiment designed to observe their responses and gather data believed to be essential for the survival of the human race.
As the third Trial draws to a close, Thomas and some of his cohorts manage to escape from WICKED, their memories having been restored, only to face new dangers as WICKED claims to be trying to protect the human race from the deadly FLARE virus.
A prequel to the worldwide Maze Runner phenomenon, The Fever Code is the book that holds all the answers. How did WICKED find the Gladers? Who are Group B? And what side are Thomas and Teresa really on? Lies will be exposed. Secrets will be uncovered. Loyalties will be proven. Fans will never see the truth coming. Before there was the Maze, there was The Fever Code.