The Traveller – John Twelve Hawks The Golden City - John Twelve Hawks

The Fourth Realm Trilogy refers to the trilogy of books written by pseudonymous author John Twelve Hawks and published between 2004 (in the UK, 2005 in the US) and 2009. The trilogy has been translated into 25 languages and has sold more than 1.5 million books.

The novels describe parallel universes, including one controlled by a shadow group called The Brethren using the Vast Machine. The Traveler was a critical success and international bestseller - with the intriguing life of the elusive author increasing reader interest in the books.