The Spectre King contains six adventures for the Pendragon roleplaying game. All are of medium length, requiring several sessions of play each.

Of note, the Grand Tournament of Logres introduces the summer tournament circuit - regularly occurring festivals that knights can attend year-after-year, with a list of events so that every year's tournament is different.

Also included is a chapter of information on the university city of Cambridge, with details on creating a university-educated character. Finally, there is background and a map for the Abbey of La Beal Adventure.