R.K. · R. Koch · R. Osborne · Rosemary Osborne
| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Walks East Sutherland | 978-1-872405-37-7 (1-872405-37-1) | 2019 | Peter D. Koch-Osborne |
| Walks Moray and the Speyside Way | 978-1-872405-43-8 (1-872405-43-6) | 2017 | Peter Koch-Osborne |
| Walks West Sutherland | 978-1-872405-36-0 (1-872405-36-3) | 2018 | " |