NOTE: This 2012 edition is the second printing of the book. This edition includes and introduction as well as an additional chapter ("The Secret of the Ancients"), that was missing from the original (2011) printing of the book.
From the back of the book:
Campaign I: Secrets of the Ancients
A complete campaign of truly epic proportions, Secrets of the Ancients takes a core theme from the original Traveller, and fully updates it to reveal the powers behind the galaxy in a way you have never seen them before. Never has a Traveller book truly been loaded with such secrets.
Written by Gareth Hanrahan, Secrets of the Ancients will start the players off in a familiar setting within the Spinward Marches, but quickly escalate to take them into times, places and dimensions they barely dreamed of. This is Traveller roleplaying at its very best.