The only truly canonical part of the series is the first one, Black Trillium, written by all three authors together. The other four were created by them separately and often contradict one another. Blood Trillium, Golden Trillium and Lady of the Trillium are all direct sequels to Black Trillium, while Sky Trillium is a sequel to Blood Trillium. Zimmer's Lady of the Trillium is set 900 years after the first novel and contains very few contradictions to Golden Trillium by Norton, however, both novels go against the continuity of May's Blood and Sky Trilliums. See folders May & norton for the other books
aro164