Military Maps of Second World War from Osprey Publishing books program needed to open file...what one can you recommend..
The clue's in the filename. You need Lizardtech's DjVu: there's a browser plugin for Windows and Mac or a standalone viewer. I've used the plugin in Firefox for some time with no problems - for some reason it's a popular option for archives in Eastern Europe. It's a sort of "PDF lite". Downloads & Resources - DjVu.org