The Sorcerer was first published on April 15, 2009 as a one-shot comic and was later included in the hardback edition of The Fall of Gilead.
It serves to further fill in the events of Treachery and acts as a prelude to the Fall of Gilead.
Gabrielle Deschain agrees to kill her husband and it is then revealed that Steven Deschain has become obsessed with the Grapefruit and through it the demon of the sphere learns of Marten's affair with Gabrielle to her annoyance.
Clay Reynolds is at the whim of John Farson, who then learns the Grapefruit is in Gilead. He gets his captive, Charles Champignon, to write a letter of introduction for his nephew James Farson, giving him the false name of Kingson. He does this to save his wife, though they kill her anyway.
The demon of the grapefruits instructs Roland Deschain to kill his mother as she is sleeping with her lover.
Marten contacts the demon in the sphere and learns she has caused Gabrielle's death and forces her back into the sphere. He leaves with Farson and the sphere.