Since the series features a fictional version of medieval Western Europe, it can be considered historical fantasy or alternate history.
An offshoot from Yeshuites, led by a descendant of Jesus and his angel companions, had made its foothold in Gaul after a long period of exile and persecution.
It is essentially a prelude to the tales of Terre d'Ange and explores the mythology and origins of Blessed Elua and his seven angelic companions.
Elua was born when the blood of the crucified Yeshua ben Yosef, the son of the One God, mixed with the tears of the Magdalene and then was quickened by Mother Earth.
Elua espoused the precept "Love as thou wilt" and he and his companions inter-bred with the native populace, creating the D'Angeline people.
They live by his precept, "Love as thou wilt," and, since Naamah sold her body at times to support Elua during their wanderings, consider prostitution to be a sacred service.
At the beginning of the series relations are generally good with Terre d'Ange's neighboring countries of Aragonia, Caerdicca Unitas, and distant Khebbel-im-Akkad.
The heroine of the first three installments of the series is anguissette Phèdre nó Delaunay, whose unique talents lead her to save her nation from several terrible fates.
The second trilogy of the series follows Imriel nó Montrève de la Courcel, Phèdre's adopted son and Prince of Terre d'Ange in his quest to manhood.