The Fort at River's Bend

Written as part of "an 1100-page monster called The Sorcerer," Jack Whyte's Canadian publishers split the text for ease of publication into two books labeled, The Sorcerer Volume 1—The Fort At River’s Bend, and The Sorcerer Volume 2—Metamorphosis. However, when the book was imported to the United States, the publisher couldn't handle the split and labelled the books The Fort At River's Bend and The Sorcerer- Metamorphisis. Because of this many of the American readers think they are two separate books. However, the incomplete nature of the plots, and Jack Whyte's original intentions, make them inapproachable without reading them together. Jack Whyte think this is an effect of "foolish" marketers, and openly criticizes this move by the publishers.[1] However, as expressed in an interview, the books, though they were only released three months apart, saw a considerable decline in sales because people were unaware that the two books were really one volume.[2]

• Ambrosius Brittanicus - Merlyn's identical half-brother, fathered by Picus Brittanticus unknowingly while recuperating from a near-death experience. Ambrosius was a successful commander in the army of Vortigern, and becomes the commander of the Camulodian forces while Merlyn is away.
• Arthur Pendragon - The bastard son of Uther Pendragon and legitimate heir to three kingships in the British Isles. This book follows him from early childhood to adolescence, watching him grow from a child with surprising insight to a leader of a band of friends, including Gwin, Ghilleadh, and Bedwyr. He often expresses surprising insights into the nature of man, military tactics and problem solving, and has a strong sense of justice.
• Caius Merlyn Brittanicus - The narrator of the story and former commander of the Camulodian military. At the beginning of the book he takes a vow of chastity and believes he has leprosy, however these both change later. He has named himself the guardian and teacher of Arthur, wishing to ensure that Arthur will be able to claim the throne of Pendragon. He has chosen to go by the name Cay throughout the book in order to escape his reputation as Merlyn. He is exceptionally schooled in Roman history, military tactics, and weapons.
• Dedulus - an expert warrior and former centurion of Camulod's army, he is one of the tutors of Arthur, training him in combat and tactics. He is often called Ded.
• Donuil- a prince of the Scots who has acted as Merlyn's aide-de-camp. His unusual size and years of training in Camulod while Merlyn's prisoner of war, then friend, make him an exceptional man of Éire who can fight with tactics and ride as cavalry. He is married to Shelagh.
• Lucanus - a physician educated in Galenic Medicine Cairo. He is a close friend of Merlyn and is one of Arthur's tutors. Lucanus dies at the end of the book.
• Shelagh- The wife of Donuil and de facto caretaker of Arthur and his friends, as two of his friends are her sons. She also is the head lady of the household in Mediobogdum and arranged Merlyn's liaison with Tress. In The Saxon Shore, Merlyn discovers that she has the same predictive dreams that he experienced through much of his life.
• Tress- a barren seamstress from Ravenglass who becomes Merlyn's mistress. She becomes arthur's mother figure as her relationship with Merlyn deepens.

The political entities of Jack Whyte's books are:

Cambria - The land of Pendragon rule in modern Wales. Though initially ruled by Dergyll ap Griffyd, a cousin of Uther Pendragon, Dergyll is killed by Merlyn's political enemy Ironhair in order to allow Ironhair's contender to gain the throne. Arthur has a stronger claim to the throne than both of these men because he is Uther's son.

Camulod - A Roman colony established in South-Western England. The establishment of this colony is depicted in the earlier books in the "A Dream of Eagles" Series. Politically, the region is ruled by a council of respected individuals within the colony, a number of whom are military rulers or members of the families which control the twelve villas which govern the lands. Their military strength is concentrated in their cavalry, which is far advanced compared to Celtic horsemen because of stirrup technology as well as the Roman-bred horse stock.

Northumbria - a kingdom in Modern northern England. It is ruled by King Vortigern. However, his Danish mercenaries have slowly gained power over him and by the end of the book appear to be in open revolt, challenging his rule.

The Picts - a people north of Hadrian's Wall. One kingdom is begging to gain political power during this period ruled by Crandal, the grandfather of another child sired by Uther who may have claim to the Pendragon throne.

Ravenglass - A city kingdom governed by King Derek, the man responsible for Uther's death. The city of Ravenglass is considered a safe and neutral port for all nations of the British Isles. Because of this, visitors must travel unarmed within the city premises.

Sons of Condran - Tribe on the Isle of Éire that is politically opposed to the Scots. Their home regions are to the north of the Scots. The head of the clan is Condran, and Brian, one of his sons, is the commander of the Army. Several major defeats of their forces by Brand and Conner of the Scots leave their forces so weak that they are unable to resist further settlement by the Scots in their land.

The Scots or Gaels - a Celtic tribal group that is ruled by the King Athol. The Kingdom is focused on the Western Coastal corridor of Ireland where Athol's Stronghold is located. The region is mostly heavily forested land. This is the group referred to by the Romans as the Scotii. They are colonizing Caledonia, a land occupied by the Picts in modern Scotland.

The bulk of the book takes place at a fort named Mediobogdum, 9 miles east of Ravenglass. Today the site is known as the Hardknott Roman Fort. While writing the book Jack Whyte was taken by his brother to the site and became inspired by it. In the text, a several week visit to the fort shapes the depictions of Merlyn's fort in the novel. All of the facilities described in the book, including the lavish bath and cement foundations for the barracks, are based on the archeological evidence available at the site.[3]

While hiding near Ravenglass, Merlyn goes by the name Master Cay, a nickname derived from his inherited "Caius". He and Arthur leave Ravenglass by boat, then return by land under the guise of Merlyn as Master Cay and Arthur as his apprentice.[4] This seems to be a reference to Kay in modern literature.