Question: Which of the following writers is best known for his biography of Adolf Hitler: John Toland or David James Duncan? 

Context paragraphs:
Alan Bullock: Alan Louis Charles Bullock, Baron Bullock, {'1': ", '2': ", '3': ", '4': "} (13 December 1914 – 2 February 2004) was a British historian.  He is best known for his book "" (1952) which was the first comprehensive biography of Adolf Hitler and influenced many other major biographies of Hitler.

The River Why: The River Why is a 1983 novel by David James Duncan.  While it initially starts off as a fishing story, "The River Why" turns into the story of a young person struggling to come to grips with the modern world.

Tank Toland: John Michael Toland (born August 31, 1973) is a former American professional wrestler, better known by his ring name, Tank Toland.  Toland is best known for his appearances on the independent circuit with promotions such as Ring of Honor, as well as his appearances with World Wrestling Entertainment on its "SmackDown! " brand in 2005 to 2006 as James Dick.

James Scurlock: James Duncan Scurlock (born September 15, 1971) is an American director, producer, writer and financial adviser.  He is probably best known for his critically acclaimed documentary "Maxed Out: Hard Times, Easy Credit and the Era of Predatory Lenders" and his award-winning book, "Maxed Out: Hard Times in the Age of Easy Credit".  His most recent book, "", is a biography of Larry Hillblom.

The Brothers K: The Brothers K is a 1992 novel by David James Duncan an author, fisherman and environmental advocate from the Pacific Northwest.  It builds on the sporting and spiritual themes of "The River Why", Duncan's first book, but on a much larger canvas, focusing on an entire family instead of a single protagonist.  Duncan uses multiple points of view to reinforce this effect by including material supposedly written by different family members in the broad narrative by Kincaid Chance.  The novel tells the story of the Chance family as they pass through the turbulent waters of Papa Chance's minor league baseball career and the upheavals of the Vietnam War.  It is also a deeply religious novel about love and family and spiritual growth and the difference between church and religion.  The title is a reference to Dostoevsky's "The Brothers Karamazov" and to the baseball abbreviation for a strikeout.

The River Why (film): The River Why is a 2010 American independent drama film directed by Matthew Leutwyler.  It is an adaptation of the 1983 Sierra Club novel of the same name by David James Duncan and stars Zach Gilford, William Hurt and Amber Heard.  Showtime broadcast the film in August 2011 and was later screened in the United States as benefit for fish and river conservation groups.  The film was released on Blu-ray and DVD on November 8, 2011.  The film won the award for Best Cinematography at the Ashland Film Festival and the Audience Award for Best film at The Naples International Film Festival.

John Toland (author): John Willard Toland (June 29, 1912 – January 4, 2004) was an American writer and historian.  He is best known for a biography of Adolf Hitler and a Pulitzer Prize-winning history of World War II-era Japan, "The Rising Sun".

Message to Adolf: Message to Adolf, known in Japan as Adolf ni Tsugu (アドルフに告ぐ , Adorufu ni Tsugu , literally: ""Reporting to Adolf"") and known in earlier English versions as Adolf, is a manga series made by Osamu Tezuka.  The story is set before World War II and is centered on three men with the name Adolf.  Adolf Kamil is an Ashkenazi Jew living in Japan.  His best friend Adolf Kaufmann is of both Japanese and German descent.  The third Adolf is Adolf Hitler, the dictator of Germany.  "Adolf" also features Sohei Toge, a Japanese reporter.  Vertical, Inc. currently publishes the series in English with Kumar Sivasubramanian as the translator, and Viz Media formerly published the series in English.

The New Patriotism Series: The New Patriotism Series is a project embarked upon by the Orion Society on the Thoughts on America Initiative to present the events of September 11 attacks and the emerging "new world order" through the eyes of several writers including Wendell Berry, Barry Lopez, Terry Tempest Williams, Richard Nelson, and David James Duncan.

David James Duncan: David James Duncan (born 1952) is an American novelist and essayist, best known for his two bestselling novels, "The River Why" (1983) and "The Brothers K" (1992).

Supporting paragraphs: John Toland (author) David James Duncan
Answer: John Willard Toland