| Clue | Source | Date |
|---|---|---|
| Cars with clutches | New York Times | 01 Jan 2023 |
| Books for users | Thomas Joseph | 28 Nov 2022 |
| Books of instructions | USA Today | 09 Jun 2022 |
| "How-to" books | Eugene Sheffer | 25 Jan 2022 |
| Troubleshooting aids | Universal | 09 Aug 2021 |
| Cars with stick shifts | Universal | 04 May 2020 |
| Books on electronic devices? | The Washington Post Sunday | 29 Apr 2018 |
| Guides | New York Times | 13 Nov 2016 |
| Handbooks | Newsday | 09 Feb 2016 |
| Guides | ||
| Handbooks | Universal | 24 Nov 2015 |
| Books often not read | New York Times | 15 Nov 2015 |
| Books often not read | ||
| Handbooks | ||
| Instruction books | ||
| Reference material | ||
| Appliance accompaniers | ||
| Handbooks | ||
| Guidebooks | ||
| Handbooks | ||
| Old typewriters | ||
| Instruction books | ||
| Useful books. | ||
| Handbooks. | ||
| Keyboards of organs. | ||
| Keyboards on an organ. |