- Author: Walker David Daniel Gray
- Language: English
- Year: 2007
- Author: S.M.Walker and R.Feldmann
- Language: English
- Year: 2001
- Author: Inside the Minds Staff William McCormick Douglas Walker
- Language: English
- Year: 2003
- Author: William Walker Dan Felice
- Language: English
- Year: 2007
- Author: N. Edward Walker
- Language: English
- Year: 1998
- Author: Derek Walker
- Language: English
- Year: 2008
- Author: Andrew Abbate James Walker Scott Chimner Rand Morimoto
- Language: English
- Year: 2007
- Author: Charles Walker Adrian Smith
- Language: English
- Year: 1995