| Clue | Source | Date |
|---|---|---|
| Nook book, e.g. | New York Times | 01 Nov 2025 |
| Nook's format, e.g. | LA Times Daily | 31 Aug 2025 |
| Screen print? | LA Times Daily | 17 Aug 2024 |
| Digital book format | LA Times Daily | 13 Jul 2021 |
| Digital book format | The Washington Post | 13 Jul 2021 |
| Kindle reading, e.g | LA Times Daily | 06 Oct 2019 |
| Kindle reading, e.g | The Washington Post | 06 Oct 2019 |
| Kindle reading, e.g. | ||
| Writing in digital format | New York Times | 03 Oct 2017 |
| Writing in digital format | ||
| Digital book, e.g | Premier Sunday | 06 Sep 2015 |
| Digital book, e.g. | ||
| Kindle material |