The Escape (John Puller #3) by David Baldacci

It's a prison unlike any other. Military discipline rules. Its security systems are unmatched. None of its prisoners dream of escaping. They know it's impossible.

Until now.

John Puller's older brother, Robert, was convicted of treason and national security crimes. His inexplicable escape from prison makes him the most wanted criminal in the country. Some in the government believe that John Puller represents their best chance at capturing Robert alive, and so Puller takes on the burden of bringing his brother in to face justice.

But Puller quickly discovers that there are others pursuing his brother, who only see Robert as a traitor and are unconcerned if he survives.