149 B.C.- Escaping just ahead of the invading Roman legions, a Carthaginian soldier carries an ancient secret to places unknown.

1925- Percy Fawcett launches his final expedition into the Amazon, but what is his true objective?

Dane Maddock is back. Deep in the Amazon, a university group encounters a horror beyond their darkest nightmares and vanishes without a trace. Called upon to undertake a daring rescue mission, Dane and Bones must trace the true path of Percy Fawcett's final expedition, but the secret that lies at the end of the search might be even deadlier than the enemies who seek it. From the streets of London, to remote islands in the Atlantic, to the deadly jungles of the Amazon, Dane and Bones must penetrate a secret lost to history, on their deadliest Quest.