| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 2007 | 978-0-9557151-0-5 | Frederik Schroyens | The Essential Synthesis |
| '' | 978-0-9557151-1-2 | Frederik Schroyens | Textbook of Repertory Language: For Essential Synthesis |
| '' | 978-0-9557151-2-9 | '' | The Essential Synthesis (Complimentary with the Essential Synthesis) |