| Abbots Langley Library | Adult fiction | Crime / Paperback | Available |
| Adeyfield 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 | Onloan - Due: 31 Jul 2025 |
| Brookmans Park Community 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 |
| Cuffley Community Library | Adult fiction | Crime / Paperback | Available |
| Goffs Oak Community 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 | Available |
| Hoddesdon Library | Adult fiction | Crime / Paperback | Available |
| Kings Langley Community Library | Adult fiction | Crime / Paperback | Available |
| Knebworth Community Library | Adult fiction | Crime / Paperback | Available |
| Leverstock Green Community Library | Adult fiction | Crime / Paperback | Onloan - Due: 22 Jul 2025 |
| London Colney Community Library | Adult fiction | Crime / Paperback | Available |
| Marshalswick Library | Adult fiction | Crime / Paperback | Available |
| Oakmere Library | Adult fiction | Crime / Paperback | Available |
| Oxhey Library | Adult fiction | Crime / Paperback | Available |
| Radlett Library | Adult fiction | Crime / Paperback | Available |
| Redbourn Community Library | Adult fiction | Crime / Paperback | Available |
| Rickmansworth Library | Adult fiction | Crime / Paperback | Onloan - Due: 18 Jul 2025 |
| Royston Library | Adult fiction | Crime / Paperback | Available |
| Sawbridgeworth Community Library | Adult fiction | Crime / Paperback | Available |
| St Albans Library | Adult fiction | Crime / Paperback | Available |
| Stevenage Central Library | Adult fiction | Crime / Paperback | Available |
| Stevenage Old Town 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 Community Library | Adult fiction | Crime / Paperback | Available |
| Welwyn Garden City Library and Information Service | Adult fiction | Crime / Paperback | Available |
| Wheathampstead Community Library | Adult fiction | Crime / Paperback | Available |
| Woodhall Library | Adult fiction | Crime / Paperback | Available |