| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 1978 | 978-0-89739-000-2 | Lance J. Klass | Leipzig Connection |
| 1993 | 978-0-89739-001-9 | Paolo Lioni | The Leipzig Connection (Basics in Education) |
| 1981 | 978-0-89739-003-3 | L. Ron Hubbard | The Second Dynamic: Introduction to Scientology Ethics |
| 1983 | 978-0-89739-004-0 | L. Ron Hubbard | The learning book |
| 2005 | 978-0-89739-013-2 | Delphi Schools Inc. | The Heron Derivation Dictionary |