| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 1987 | 978-0-9512373-0-4 | M. C Williams | Chwarelwyr cyntaf Ffestiniog |
| '' | 978-0-9512373-1-1 | M. J. T Lewis | Pioneers of Ffestiniog slate |
| '' | 978-0-9512373-2-8 | Lewis. M.J.T. | The Slate quarries of North Wales in 1873: A series of letters by a special correspondent of The Carnarvon and Denbigh herald |
| 1989 | 978-0-9512373-3-5 | M. J. T Lewis | Sails on the Dwyryd: The river transport of Ffestiniog slate |
| '' | 978-0-9512373-6-6 | Gwyndaf Hughes | House on a hill: A history of Plas Tan y Bwlch and the Maentwrog Valley |