| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| How the U.S. Senate Works | 978-0-07-032313-1 (0-07-032313-5) | 1970 |
| The Adventure of the Stalwart Companions: Heretofore Unpublished Letters and Papers Concerning a Singular Collaboration Between Theodore Roosevelt and Sherlock Holmes | 978-0-06-012248-5 (0-06-012248-X) | 1978 |
H.J. · H. Jeffers · H. P. · H. P. Jeffers · H. Paul · H. Paul Jeffers · Harry Paul · P.J. · Paul J. · Paul Jeffers