| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 2004 | 978-0-9546875-0-2 | Mark Alexander Shepherd · David Mark Shepherd | Parker "51": The World's Most Successful Fountain Pen |
| '' | 978-0-9546875-1-9 | David Shepherd · Mark Shepherd | Parker "51" |
| 2006 | 978-0-9546875-2-6 | David Shepherd · Dan Zazove | Parker Duofold |