| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 2018 | 978-1-9993018-0-4 | S. L. Ager | The Cadwaladr Quests (Book One: Tangled Time): The unique and engaging vocabulary aid for all eleven-plus, SATs and independent school entrance exams, including Key Stage 3 |
| 2020 | 978-1-9993018-7-3 | '' | The Cadwaladr Quests (Book One: Tangled Time) USA: The Unique SSAT & ISEE Lower/Middle Vocabulary Novel (The Cadwaladr Quests (USA)) |