| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 2008 | 978-0-9642795-0-6 | Michael Andre-Driussi | Lexicon Urthus, Second Edition |
| '' | 978-0-9642795-1-3 | Michael Andre-Driussi | Lexicon Urthus: A Dictionary for the Urth Cycle |
| 1994 | 978-0-9642795-9-9 | '' | Lexicon Urthus: A Dictionary for the Urth Cycle |