- Author: Pwyll ap SiônGann KylePotter Keith, Kyle Gann, Pwyll ap Siôn
- Language: English
- Year: 2016
- Author: Dodgson Mark, Gann David
- Language: English
- Year: 2018
- Author: Dodgson Mark, Gann David
- Language: English
- Year: 2018
- Author: Dodgson Mark, Gann David
- Language: English
- Year: 2010
- Author: Gann Kirby, Knowles John
- Language: English
- Year: 2016
- Author: Mark Dodgson, David Gann
- Language: English
- Year: 2018
- Author: Mark Dodgson, David M. Gann
- Language: English
- Year: 2018