| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 2000 | 978-0-9538417-0-7 | Patience Bagenal | Hertingfordbury Park and Its Links with the Bayfordbury Estate |
| '' | 978-0-9538417-1-4 | Tom Williamson | The parks and gardens of West Hertfordshire |
| 2005 | 978-0-9538417-2-1 | Anne Rowe | A History of Knebworth's Parks |