Quote Originally Posted by Leonardj View Post
Well we are so lucky to have five great books since the Dennis Hiller editions.
In no particular order

John Griffiths Encyclopedia Spring Air Pistols

Christopher Thrale's book of the Webley Air Rifle

John Milewski's The book of the BSA Air Rifle

Webley Air Pistols book by Gordon Bruce.

The Airgun Book (any volume) by John Walter

In my opinion, I think these and Danny Garvin's online Vintage Airguns Gallery is as good as it gets.
Fixed it for you.