Siegfried Lenz (1926-) is a German novelist and essayist. He published his first novel in 1951 and has been very prolific since. He seems to be especially popular with some serious Russian readers, who even predict that he will win the Nobel one day.
We have two threads devoted to his books here at the WLF already:
Siegfried Lenz: Landesbühne
Siegfried Lenz: A Minute's Silence
Meanwhile, the man himself: