Ferrell wrote prolifically, sharing with Bemis a disapproval of what they called "one-book men" who stopped writing after finishing a Ph.D. dissertation. while Alonzo L. Hamby's review in
Journal of Cold War Studies called the book "restrained and gentlemanly" and noted that Ferrell viewed prominent revisionist
William Appleman Williams as a friend. In a 1995 article in
American Heritage, he accused
Merle Miller, author of the bestselling book
Plain Speaking: An Oral Biography of Harry. S. Truman, of fabricating many of the quotes attributed to Truman. In 1998's
The Dying President, Ferrell examined
Franklin D. Roosevelt's medical records and concluded that Roosevelt had deliberately chosen to keep the cardiovascular disease which would soon kill him secret from the public. The book was praised by historian
John Lukacs as “painstaking and exceptionally researched … sparklingly well-written, bearing the marks of a master historian” and one of the most important books on Roosevelt by any historian.
Harry S. Truman Ferrell wrote voluminously on Truman, devoting more than a dozen books to his life and presidency. Ferrell's work rehabilitated the reputation of the Truman presidency, which had been previously considered a failure by scholars, by providing evidence of how decisions such as Truman's choice to champion the
Marshall Plan led to the successful establishment of an American-led post-war world order. Coincidentally, Ferrell and Truman were born on the same day, May 8. ==Awards==