| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 1989 | 978-1-883714-03-1 | William G. Langdon | Bits and Bitting Manual |
| 1990 | 978-1-883714-04-8 | William G., Jr. Langdon | Bits, Patterns & Reining |
| 1992 | 978-1-883714-05-5 | '' | Training With Bits |
| 1993 | 978-1-883714-06-2 | William G., Jr. Landgon | Ride Right |
| 1997 | 978-1-883714-07-9 | '' | Saddle Fitting: How to Select the Right Saddle to Fit You & Your Horse |