Author of several books, including:
- Campion, Nicholas: "The Book of World Horoscopes" (1987) ISBN 0-85030-527-6
- Campion, Nicholas, Michael Baigent, and Charles Harvey. Mundane Astrology (Thorsons, 1992) ISBN 1-85538-140-0
- Campion, Nicholas: "An Introduction to the History of Astrology" (1982) ISBN 0-9508412-0-X
- Campion, Nicholas: "The Practical Astrologer" (1987) ISBN 0-600-50304-6
- Campion, Nicholas: "The Great Year: Astrology, History and Millenarianism in the Western Tradition" (1994)
- Campion, Nicholas: "Astrology, History and Apocalypse" (2000).
- Campion, Nicholas: "Zodiac, Enhancing your Life with the Stars" (2000).
- Campion, Nicholas: "A History of Western Astrology" 2 Vols(2008,9) ISBN 1-85285-257-7.
- Campion, Nicholas: "What Do Astrologers Believe?" (2006).