"The Mighty 'Jungle': Two biographies of Upton Sinclair on the 100th anniversary of his most famous book."
July 2, 2006 · pg. 10 · by: David Thomson
New York Times (US)
"Upton Sinclair, Author, Dead; Crusader for Social Justice 90; 90 Books, Including 'Oil!' [1927] and 'The Jungle' [1906], Caused Many to Join His Protests"