Interesting books form German authors to read

I asked in a German forum what books from German authors a foreigner should read so that she/he would get a good impression of German literature and

• Germany - here are the answers:
• Erich Maria Remarque, Drei Kameraden
• Walter Kempowski, "Tadelöser & Wolff"
• Siegfried Lenz, German Lesson (Deutschstunde)
• Bernhard Schlink, The Reader oder aber Self's Punishment
• Cornelia Funke, Inkheart, Inkspell und Inkdeath