Have just finished my final Gunther novel (Berlin Noir). In terms of Bernie's chronological life I've pretty much read them in reverse order as I was introduced to the books when a friend lent me Field Gray.
I sometimes find myself speculating on Bernie's final days. I see him back in Berlin, living modestly on limited means. The cigarettes, booze and conditions he's endured preclude a long life, perhaps he just about makes it to 1970. Despite his liberal leanings he was still born in the Victorian era and I doubt he has any love for the concrete buildings going up around him. The counter culture? Part of him should celebrate it's arrival but I'm not sure sure he would. I'm afraid I see his well worn cynicism developing into bitterness.
A melancholy view of the end of his life, apologies if this runs counter to anything stated in the novels, it's been a while since I read Field Gray