| Abbots Langley Library | Adult non-fiction | 458.3421 | Check item (Set: 07 Apr 2014) |
| Borehamwood Library | Adult non-fiction | 458.3421 | Check item (Set: 07 Apr 2014) |
| Bushey Library | Adult non-fiction | 458.3421 | Check item (Set: 07 Apr 2014) |
| Cheshunt Library | Adult non-fiction | 458.3421 | Check item (Set: 08 Apr 2014) |
| Harpenden Library | Adult non-fiction | 458.3421 | Check item (Set: 08 Apr 2014)Onloan - Due: 19 Jul 2025 |
| Hertford Library | Adult non-fiction | 458.3421 | Available |
| Hitchin Library | Adult non-fiction | 458.3421 | Check item (Set: 08 Apr 2014) |
| Hoddesdon Library | Adult non-fiction | 458.3421 | Check item (Set: 07 Apr 2014) |
| Knebworth Community Library | Adult non-fiction | 458.3421 | Check item (Set: 07 Apr 2014) |
| Letchworth Library | Adult non-fiction | 458.3421 | Check item (Set: 07 Apr 2014) |
| Oxhey Library | Adult non-fiction | 458.3421 | Check item (Set: 07 Apr 2014) |
| Radlett Library | Adult non-fiction | 458.3421 | Check item (Set: 07 Apr 2014) |
| Rickmansworth Library | Adult non-fiction | 458.3421 | Check item (Set: 07 Apr 2014)Onloan - Due: 15 Jul 2025 |
| St Albans Library | Adult non-fiction | 458.3421 | Check item (Set: 08 Apr 2014) |
| Tring Library | Adult non-fiction | 458.3421 | Check item (Set: 07 Apr 2014) |
| Ware Library | Adult non-fiction | 458.3421 | Check item (Set: 07 Apr 2014) |
| Welwyn Garden City Library and Information Service | Adult non-fiction | 458.3421 | Check item (Set: 08 Apr 2014) |