In 'Munich The Edge of War Fiction', it might be that the story is centered around the Munich setting just before a war breaks out. It could explore how individuals deal with the impending danger. Maybe there are diplomats trying to prevent the war through negotiations, while at the same time, ordinary people are preparing for the worst. There could be stories of heroism, betrayal, and the struggle for survival in a city that is about to be engulfed in the chaos of war.
I haven't actually read 'Munich The Edge of War Fiction' in full, but generally in such books set on the edge of war, it could be about the build - up to a major conflict in Munich. It may focus on the different factions - military, political, civilian - and how they interact as the situation becomes more and more tense. There could be a story of love and sacrifice against the backdrop of a city on the verge of destruction or major upheaval.