| Abbots Langley Library | Non fiction | BOP 616.83Books on prescription | Available |
| Baldock Library | Non fiction | BOP 616.83Books on prescription | Available |
| Berkhamsted Library | Non fiction | BOP 616.83Books on prescription | Available |
| Bishops Stortford Library | Non fiction | BOP 616.83Books on prescription | Available |
| Borehamwood Library | Non fiction | BOP 616.83Books on prescription | Available |
| Buntingford Library | Non fiction | BOP 616.83Books on prescription | Available |
| Bushey Library | Non fiction | BOP 616.83Books on prescription | Available |
| Cheshunt Library | Non fiction | BOP 616.83Books on prescription | Available |
| Croxley Green Library | Non fiction | BOP 616.83Books on prescription | Available |
| Harpenden Library | Non fiction | BOP 616.83Books on prescription | Missing copy (Set: 01 Jun 2023) |
| Hatfield Library | Non fiction | BOP 616.83Books on prescription | Available |
| Hemel Hempstead Library | Non fiction | BOP 616.83Books on prescription | Available |
| Hertford Library | Non fiction | BOP 616.83Books on prescription | Available |
| Hitchin Library | Non fiction | BOP 616.83Books on prescription | Missing copy (Set: 24 Jun 2022) |
| Hoddesdon Library | Non fiction | BOP 616.83Books on prescription | Available |
| Letchworth Library | Non fiction | BOP 616.83Books on prescription | Available |
| Marshalswick Library | Non fiction | BOP 616.83Books on prescription | Available |
| Mobile Services Base | Non fiction | 616.83Memory closed access | Missing copy (Set: 19 Dec 2019) |
| Mobile Services Base | Non fiction | 616.83Memory closed access | Available |
| Mobile Services Base | Non fiction | 616.83Memory closed access | Missing copy (Set: 22 Mar 2024)In-transit from Central Stocks Unit to Mobile Services Base (Set: 07 Jun 2023) |
| North Watford Library | Non fiction | BOP 616.83Books on prescription | Available |
| Oakmere Library | Non fiction | BOP 616.83Books on prescription | Available |
| Oxhey Library | Non fiction | BOP 616.83Books on prescription | Available |
| Radlett Library | Non fiction | BOP 616.83Books on prescription | Available |
| Rickmansworth Library | Non fiction | BOP 616.83Books on prescription | Available |
| Royston Library | Non fiction | BOP 616.83Books on prescription | Available |
| St Albans Library | Non fiction | BOP 616.83Books on prescription | Available |
| Stevenage Central Library | Non fiction | BOP 616.83Books on prescription | Missing copy (Set: 28 Jan 2019) |
| Tring Library | Non fiction | BOP 616.83Books on prescription | Available |
| Waltham Cross Library | Non fiction | BOP 616.83Books on prescription | Available |
| Ware Library | Non fiction | BOP 616.83Books on prescription | Available |
| Watford Central Library | Non fiction | BOP 616.83Books on prescription | Available |
| Welwyn Garden City Library and Information Service | Non fiction | BOP 616.83Books on prescription | Available |