The concept of a book detailing the ancestry of King Arthur, known as the "Book of Sires" or "Liber Regum," emerged during this period. This hypothetical text was believed to contain the genealogical records of Arthur's family, tracing his lineage back to the ancient British kings and, ultimately, to the legendary founder of Britain, Brutus.
The Book of Sires was written by and published by Nocturnal Media under the Pendragon Classic line for Chaosium . The PDF was last updated in February 2019.
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: Provides a chronological history from 439 to 509, covering humdrum garrison duty to legendary historical battles. pendragon book of sires pdf
DriveThruRPG once offered a free preview of the Book of Sires (pages 1–8). This excerpt is still available on some archive mirrors. It includes the introduction, a sample sire (Sir Elad of Salisbury), and the “Using Sires in Play” section.
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They called him Caelen, though the old songs called him other names, names scholars argued over and tavern singers mangled into fresh legend. He bore no coronet, and yet an old thing stirred when he stood in the doorway of that ruined keep: an expectation as ancient as the bedrock, as stubborn as the bracken. The keep had been the seat of a line once—sinews of power, oaths knotted together like rope—and now it kept only the relic-bones of law and the fossils of feud. People still came to it though: to swear, to beg, to curse, to disappear from the maps of their promise. The concept of a book detailing the ancestry
"Hands down, this is one of the greatest rpg books that I have ever purchased... I love this book and open it almost weekly to reference it." — Brian B.
It's worth noting that a few community-created expansions and resources exist, such as Spanish introductions to specific cultures for the Book of Sires or forum discussions on homebrewing elements. However, these are not official Chaosium products and should not be confused with the official Book of Sires .
The Great Pendragon Campaign (GPC) is a massive, 80-year chronological campaign widely regarded as one of the greatest modules in TTRPG history. The Book of Sires acts as the perfect prologue to the GPC. The PDF was last updated in February 2019
The King Arthur Pendragon 5.2 rulebook (available as a legal PDF on DriveThruRPG for $29.99) includes a condensed version of sire generation in Chapter 2: Character Creation. Pages 40–47 offer simplified tables for ancestor events. This “Book of Sires Lite” is not the full product but provides about 40% of the functionality.
Tailors your history based on where your family originates, whether from Logres, Cumbria, Cambria, or even foreign lands like Aquitaine.
Likely 2026–2027.
