Eternal Summer by Franziska Gänsler Reviewed by Steven G. Kellman             The grand spas of Europe provide elegant settings for wondrous human collisions in works by Anton Chekhov, Fyodor Dostoyevsky, Thomas Mann, and others. But Bad Heim, the German resort town in Franziska Gänsler’s sizzling debut novel is extraordinarily hot – in the sense not of trendy but scalding. Wildfires …