Everything you need to understand or teach On a Pale Horse by Piers Anthony.
In a world where magic is as powerful as science, Zane is a balanced soul: half good and half evil. When he decides to kill himself, Death comes for him to take and judge his soul, and Zane shoots Death instead. He discovers that he must take Death's place, and further, he discovers that he's been manipulated by supernatural powers to save the beautiful magician's daughter Luna and foil Satan's plans...
On a Pale Horse Lesson Plans contain 97 pages of teaching material, including: