They take place in a post-holocaust world that is hinted to be a colony of earth on another planet where magic works.
[2] The German literature agent Uwe Luserke[2] in 1989 devised the concept of three fantasy authors coming together to collaborate to produce a novel: this would describe three different life stories bound together by a single A-Plot of a story of three princesses, who were robbed of their kingdom and try to survive in a hostile world.
The three collaborated on the first novel, Black Trillium:[3] Bradley wrote Haramis' chapters, May authored Anigel's, and Norton contributed Kadiya's.
[5] Lady of the Trillium takes place many years after the first three novels in the series, and tells of the efforts of the only living sister to find and train a successor to lead the world.
[6] A review of Black Trillium in The Rotarian criticized, among other things, "the deadly dull characters, and a boring landscape"; ascribing the issues to the fact that there were "too many cooks".