I just finished reading this book, Neither Friend Nor Foe, the European Neutrals in World War II by Jerrold M. Packard. It tells the story of Spain, Protugal, Swedon, Switzerland and Ireland during World War Two.
There are no photos but some very interesting wargame secenarios. All of these countries worried at one time or another that the Germans or British or Americans or even the Soviet Union were about to invade them. Imagine Swiss vs USSR or a German invasion of Ireland, or perhaps Finns and Germans invade Swedon. Good book, a bit dry, but filled with stuff I never knew.