I read Im Westen Nichts Neues (All quiet on the west front) for my german class about 20 years ago. It was pretty hard to understand in german, so I had to read it in swedish just to be able to do the book report. I must say that I liked it though. Itwas good enough for me to look for other books by Remarque. I found "A Time to Love and a Time to Die", which I also enjoyed, in swedish though.
Another german author that I like is Michael Ende. There are probably mor, but I can't remember their names right now.