| Abbots Langley Library | Adult non-fiction | 639.978 | Available |
| Baldock Library | Adult non-fiction | 639.978 | Available |
| Berkhamsted Library | Adult non-fiction | 639.978 | Available |
| Bishops Stortford Library | Adult non-fiction | 639.978 | Available |
| Borehamwood Library | Adult non-fiction | 639.978 | Available |
| Bovingdon Community Library | Adult non-fiction | 639.978 | Available |
| Buntingford Library | Adult non-fiction | 639.978 | In-transit from Ware Library to Buntingford Library (Set: 28 Sep 2024) |
| Bushey Library | Adult non-fiction | 639.978 | Available |
| Cheshunt Library | Adult non-fiction | 639.978 | Available |
| Chorleywood Community Library | Adult non-fiction | 639.978 | Available |
| Croxley Green Library | Adult non-fiction | 639.978 | Available |
| Harpenden Library | Adult non-fiction | 639.978 | Onloan - Due: 19 Jul 2025 |
| Hatfield Library | Adult non-fiction | 639.978 | Available |
| Hemel Hempstead Library | Adult non-fiction | 639.978 | Available |
| Hertford Library | Adult non-fiction | 639.978 | Available |
| Hitchin Library | Adult non-fiction | 639.978 | Available |
| Hoddesdon Library | Adult non-fiction | 639.978 | Available |
| Kings Langley Community Library | Adult non-fiction | 639.978 | Available |
| Knebworth Community Library | Adult non-fiction | 639.978 | Available |
| Letchworth Library | Adult non-fiction | 639.978 | Available |
| Marshalswick Library | Adult non-fiction | 639.978 | Available |
| North Watford Library | Adult non-fiction | 639.978 | Available |
| Oakmere Library | Adult non-fiction | 639.978 | Available |
| Oxhey Library | Adult non-fiction | 639.978 | Available |
| Radlett Library | Adult non-fiction | 639.978 | Available |
| Rickmansworth Library | Adult non-fiction | 639.978 | Available |
| Royston Library | Adult non-fiction | 639.978 | Available |
| Sawbridgeworth Community Library | Adult non-fiction | 639.978 | Available |
| St Albans Library | Adult non-fiction | 639.978 | Available |
| Stevenage Central Library | Adult non-fiction | 639.978 | Available |
| Tring Library | Adult non-fiction | 639.978 | Onloan - Due: 14 Jul 2025 |
| Ware Library | Adult non-fiction | 639.978 | Available |
| Watford Central Library | Adult non-fiction | 639.978 | Available |
| Welwyn Garden City Library and Information Service | Adult non-fiction | 639.978 | Available |