- Author: David Allen, Mike Williams, Mark Wallace
- Language: English
- Year: 2018
- Author: Zalasiewicz Jan, Williams Mark, Mark Williams
- Language: English
- Year: 2018
- Author: Segal Zindel V., Williams Mark, Teasdale John
- Language: English
- Year: 2012
Ireland's Immortals
epub
- Author: Williams Mark
- Language: English
- Year: 2016
Sleepless Knights
epub
- Author: King Arthur, King. Arthur, Williams Mark H
- Language: English
- Year: 2013
- Author: Thomas J Williams, Mark A Staal, Sally C Harvey
- Language: English
- Year: 2019
- Author: Thomas J Williams, Mark A Staal, Sally C Harvey
- Language: English
- Year: 2019
- Author: Martin Lee Roy, Williams Mark L.
- Language: English
- Year: 2013
- Author: Martin Lee Roy, Williams Mark L.
- Language: English
- Year: 2013
- Author: China Williams Mark Beales Tim Bewer Celeste Brash Austin Bush David Eimer and Adam Skolnick
- Language: English
- Year: 2014