| Clue | Source | Date |
|---|---|---|
| The world's best-selling mystery novel written by Agatha Christie in 1939 under a different title (3,4,5,4,4) | ||
| Agatha Christie's bestselling book | The Times Specialist Sunday | 16 Mar 2025 |
| Novel whose name consists entirely of the letters in 62-Across | Premier Sunday | 30 Jan 2022 |
| 1939 Agatha Christie classic |