- Author: Christopher S. Butler, Javier Martín Arista
- Language: English
- Year: 2008
- Author: John H. Connolly (editor), Roel M. Vismans (editor), Christopher S. Butler (editor), Richard A. Gatward (editor)
- Language: English
- Year: 1996
- Author: KNIGHT Christopher and BUTLER Alan
- Language: English
- Year: 2007
- Author: Christopher KnightAlan Butler
- Language: English
- Year: 8
Civilization One: The World is Not as You Thought it Was: Uncovering the Super-science of Prehistory
epub
- Author: Christopher KnightAlan Butler
- Language: English
- Year: 30
Who Built the Moon?
epub
- Author: Christopher KnightAlan Butler
- Language: English
- Year: 30
- Author: John H. Connolly Roel M. Vismans Christopher S. Butler (eds.)
- Language: English
- Year: 2010
- Author: Christopher S. Butler Francisco Gonzálvez-García
- Language: English
- Year: 2014
- Author: Christopher S. Butler
- Language: English
- Year: 1985