| Abbots Langley Library | Adult fiction | Crime / Paperback | Available |
| Baldock Library | Adult fiction | Crime / Paperback | Available |
| Berkhamsted Library | Adult fiction | Crime / Paperback | Available |
| Bishops Stortford Library | Adult fiction | Crime / Paperback | Available |
| Borehamwood Library | Adult fiction | Crime / Paperback | Available |
| Bovingdon Community Library | Adult fiction | Crime / Paperback | Available |
| Buntingford Library | Adult fiction | Crime / Paperback | Available |
| Bushey Library | Adult fiction | Crime / Paperback | Available |
| Cheshunt Library | Adult fiction | Crime / Paperback | Available |
| Chorleywood Community Library | Adult fiction | Crime / Paperback | Available |
| Croxley Green Library | Adult fiction | Crime / Paperback | Available |
| Goffs Oak Community Library | Adult fiction | Crime / Paperback | Available |
| Harpenden Library | Adult fiction | Crime / Paperback | Available |
| Hatfield Library | Adult fiction | Crime / Paperback | Available |
| Hemel Hempstead Library | Adult fiction | Crime / Paperback | Available |
| Hertford Library | Adult fiction | Crime / Paperback | In-transit from Welwyn Garden City Library and Information Service to Hertford Library (Set: 02 Mar 2023) |
| Hitchin Library | Adult fiction | Crime / Paperback | Available |
| Hoddesdon Library | Adult fiction | Crime / Paperback | Available |
| Kings Langley Community Library | Adult fiction | Crime / Paperback | Available |
| Letchworth Library | Adult fiction | Crime / Paperback | Available |
| Marshalswick Library | Adult fiction | Crime / Paperback | Available |
| North Watford Library | Adult fiction | Crime / Paperback | Onloan - Due: 21 Jul 2025 |
| Oakmere Library | Adult fiction | Crime / Paperback | Available |
| Oxhey Library | Adult fiction | Crime / Paperback | Available |
| Radlett Library | Adult fiction | Crime / Paperback | Available |
| Rickmansworth Library | Adult fiction | Crime / Paperback | Available |
| Royston Library | Adult fiction | Crime / Paperback | Available |
| St Albans Library | Adult fiction | Crime / Paperback | Available |
| Stevenage Central Library | Adult fiction | Crime / Paperback | Available |
| Tring Library | Adult fiction | Crime / Paperback | Available |
| Waltham Cross Library | Adult fiction | Crime / Paperback | Available |
| Ware Library | Adult fiction | Crime / Paperback | Available |
| Watford Central Library | Adult fiction | Crime / Paperback | Available |
| Welwyn Garden City Library and Information Service | Adult fiction | Crime / Paperback | Available |