The assassination of President John F. Kennedy is, in the words of journalist David Talbot, "the greatest unresolved mystery of the 20th century." Each year dozens of books are published on the assassination. The most important JFK assassination book to appear in 2005 was Ultimate Sacrifice. The book is the result of 17 years of research and investigation; the two authors have consulted hundreds of books, pored over hundreds of thousands of the millions of government documents relating to the assassination declassified since 1992, and interviewed scores of persons, including former high-ranking officials of the Kennedy administration.
Wilkes, Donald E. Jr., "Deus Ex Mafia: The Solution to America's Greatest Murder Mystery?" (2006). Popular Media. 109.