Gunnar Svante Paulsson ( also known as Steve Paulsson ) is a Swedish-born Canadian historian , university lecturer and author who has taught in Britain , Canada , Germany and Italy . He specializes in history of The Holocaust and has been described as " an expert on that period " . He is best known for his 2002 book , '' Secret City : The Hidden Jews of Warsaw 1940-1945 ''
The Holocaust
The Holocaust
Gunnar S. Paulsson