| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Mystery of the Riverboat | 6301778251 (6301778251) | 1990 | William A. Sickner · Ace Herman · Alvin Todd · Henry MacRae · Maurice Tombragel |
| The Master Key | 6302494664 (6302494664) | 2002 | Morgan Cox · Dwight V. Babcock · George H. Plympton · Jack Natteford · Joseph O'Donnell |