User:Lorfell

I am looking for information re: the full title of the Book written either before or after the Movie "In Darkness" was made (2011). I believe the survivors went to Israel after the 2nd World War, and one of the children who survived wrote a book about the experience of living in the sewer in Poland during the war. First word of the title is "Sewer..., and name of the Pole who saved them was Leonard Socho. I am looking for the author's name and full title of the book.