Uterra

Seventy-two years old. Decorated SAS colonel. Happily retired. None of it matters when the crocodile hits.

James Mack should be dead. Instead he wakes up thirty levels underground in a facility that doesn't exist on any map, restored to the prime of his life by a serum that was never designed for human use. A visitor from five thousand years in the future tells him he is the first of a new kind of human, and that civilisation itself depends on what he does next.

What he does next is hunt a terrorist cell hiding inside the base, racing to stop attacks on three cities before September 2001 changes the world forever.