Additional sources of related material

Websites
The Advent Antiphons: www.cofe.anglican.org/worship/downloads/pdf/tandsadvent.pdf
For a metrical version and the full text with a tune as a graphic and also as a midi file see: www27.brinkster.com/johnhartley/music/song--159.html

Asimov's Laws of Robotics: www.anu.edu.au/people/Roger.Clarke/SOS/Asimov.html 

Books 
Penny Frank, Steve Pittis, Mel McPherson, James Lawrence and Geoff Treasure, Lost for Words , a course by CPAS is a resource to help church members talk more naturally about their faith.