| Bishops Stortford Library | Adult non-fiction | 643.7 | Available |
| Cheshunt Library | Adult non-fiction | 643.7 | In-transit from Waltham Cross Library to Cheshunt Library (Set: 09 May 2022) |
| Chorleywood Community Library | Adult non-fiction | 643.7 | Available |
| Croxley Green Library | Adult non-fiction | 643.7 | Available |
| Hatfield Library | Adult non-fiction | 643.7 | Available |
| Hertford Library | Adult non-fiction | 643.7 | Available |
| Hitchin Library | Adult non-fiction | 643.7 | Available |
| Letchworth Library | Adult non-fiction | 643.7 | Available |
| North Watford Library | Adult non-fiction | 643.7 | Available |
| Oakmere Library | Adult non-fiction | 643.7 | Available |
| Oxhey Library | Adult non-fiction | 643.7 | Available |
| Radlett Library | Adult non-fiction | 643.7 | Onloan - Due: 23 Jul 2025 |
| Royston Library | Adult non-fiction | 643.7 | Available |
| St Albans Library | Adult non-fiction | 643.7 | Available |
| Stevenage Central Library | Adult non-fiction | 643.7 | Available |
| Ware Library | Adult non-fiction | 643.7 | Available |
| Watford Central Library | Adult non-fiction | 643.7 | Onloan - Due: 31 Aug 2021Lost copy (Set: 03 Nov 2021) |
| Welwyn Garden City Library and Information Service | Adult non-fiction | 643.7 | Available |