you can get the Paradox book direct from David Baker. I think Vol. III of The British Shotgun will come out pretty soon.

The boxlock book - a third is written but I have been quite busy and finding the time and energy to get on with it has been hard. They always say the first one is easy - I admire Don, David and Vic for the amount of work they are able to produce! I struggle to do an article a month for Sporting Shooter and a couple a year for Double Gun Journal.