[2] In the summary of M. J. Driscoll, Jarl Addoníus of Dalmaría has five sons, Abel, Endor, Dathan, Símon and Kristófer, whom he has instructed in the arts and sciences, sports and languages, in all of which they excel.
The earl, who is himself a Christian, sees that the brothers are attracted to a variety of religious beiefs, and asks each to explain what beliefs he holds.
Abel, the eldest, says he follows the religion preached by Zoroaster, Endor claims to believe in Óðinn, Dathan in Muhammad, and Símon in Judaism, which Kristófer, the most intelligent and learned of the brothers, says he is a follower of the teachings of Jesus Christ.
The saga then follows each of the brothers in turn, ending with Kristófer, who, not surprisingly, is the most successful.
[3]Jón's sources include prominently the Old Norse Völuspá and Heimskringla, and the Almindelig Kirke-Historie and Helte-Historier by Ludvig Holberg, while the overall premise of comparing religions seems to be inspired by Zadig, by Voltaire, which Jón also adapted into Icelandic.