| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| The World's Most Difficult Quiz 2: More King William's College General Knowledge Papers | 978-1-84631-837-5 (1-84631-837-8) | 2012 |
| The World's Most Difficult Quiz: The King William's College General Knowledge Papers | 978-1-84631-695-1 (1-84631-695-2) | 2011 |