1992 - Marwell: The Story So Far
2009 - We Went To The Zoo Today: The Golden Age Of Zoo Postcards
1988 - The Elephant Who Walked To Manchester
1989 - The Reptiles Of Belle Vue 1950-1977 (with Clive Bennett)
1989 - The Wombwell Menagerie Log Book (with G. Percival and K. Tomlinson)
1996 - Quaggas And Other Zebras
1997 - A Chronology Of The Zebras Of Belle Vue, Manchester
2001 - The Elephants Of Belle Vue
2001 - Quagga Quotations: A Quagga Bibliography
2004 - Letters To Mr Tegetmeier
2009 - The IZES Guide To British Zoos And Aquariums
2011 - An Illustrated History Of Bristol Zoo Gardens
2002 - Fauna Britannica
2008 - The Legend Of Salt And Sauce
1996 - London Zoo From Old Photographs 1852-1914
2012 - London Zoo From Old Photographs 1852-1914 (second edition)
2009 - The Eponym Dictionary Of Mammals
2011 - The Eponym Dictionary Of Reptiles
2013 - The Eponym Dictionary Of Amphibians
2014 - The Eponym Dictionary of Birds
A combined index for the "Where the ..." series can be downloaded here.
1983 - The Life And Death of Belle Vue (revised 1987)
1984 - Where The Lion Trod
1985 - Where The Crane Danced
1986 - The Ashover Zoological Garden
1988 - They All Came Into The Ark (London)
1989 - They Live At The Castle (Dudley)
1989 - Where The Zebu Grazed
1990 - Belle Vue Bygones
1990 - Whipsnade's War
1991 - In The Beginning (London)
1991 - Where The Elephant Walked
1992 - A Short History Of British Reptile Keeping
1992 - Here, There And Regent's Park
1992 - The Fragments That Remain (Belle Vue)
1993 - What's In A Name?
1993 - Where The Macaw Preened
1994 - One Man And His Animals
1995 - Where The Penguin Plunged
1995 - Wonderful Year (London)
1996 - The Chessington Story
1997 - Remember Belle Vue
1998 - The Bristol Book
1999 - Sir Peter's Way (Whipsnade)
1999 - Where The Leopard Lazed
2000 - The Marvel By The Mersey (Knowsley)
2000 - Year Of Janus (London)
2001 - Bits About Birds
2001 - E Tenebris (London - 2 volumes)
2002 - Skyscrapers And Sealions (Central Park)
2002 - Where The Peacock Screamed
2003 - Little Acorns Grow (Linton)
2003 - Where The Camel Strode
2005 - Chessington Notebook
2006 - Lubetkin's Legacy (Dudley)
Unpublished - Where The Coati Climbed
A New Look At Animals
Not Gorillas Again!
A Young Person's Guide To Animal Names
The Changing Land
101 Questions Answered About Animals
Shopping Safari
1958 - Unusual Pets
1961 - Cavies
1961 - Mice And Rats As Pets
1962 - Baby Animals
1962 - Meet The Mammals
1964 - Meet The Reptiles
1968 - Meet The Birds
1970 - Keeling's Ark (Ashover Zoological Garden)
1976 - Odd Animals
1978 - Under The Sea
1986 - A Beginner's Guide To Keeping Frogs And Lizards
1987 - Dwarf Hamsters
1989 - New Look At Animals
2016 - Ligers, Tigons and Other Hybrid Mammals (published posthumously; edited by Russell Tofts)
2001 - Zoo And Aquarium History (as editor)
2013 - Bognor's Zoo: A Short History of the Animal Collection in Hotham Park
2017 - Buffalo: A History and Natural History of the North American Bison
2001 - Mystery Cats In Devon And Cornwall
2004 - Mystery Sea Serpents Of The South-West
2005 - Big Cat Mysteries Of Somerset
2005 - While The Cat's Away: An Exmoor Escapade
2007 - Mystery Big Cats Of Dorset
1957 - British Zoos: A Study Of Animals In Captivity
1970 - The Penguin Guide To British Zoos
1976 - Wildlife In Britain (essays on zoos)
1999 - Kenkay And Colobus: A Tourist In Ghana
2012 - Animals In The Blood: The Ken Smith Story
2016 - Ligers, Tigons and Other Hybrid Mammals (as editor)