Question: Katharine the Great is an unauthorized biography of what American publisher?

Context paragraphs:
The Polyester Prince: The Polyester Prince: The Rise of Dhirubhai Ambani is an unauthorized biography of Indian business tycoon and Reliance Industries founder Dhirubhai Ambani.  The book was written by Australian journalist Hamish McDonald and first published by Allen & Unwin, an Australian publisher, in 1998.  The book was never published in India and was banned there.

James Hogg: James Hogg (1770 – 21 November 1835) was a Scottish poet, novelist and essayist who wrote in both Scots and English.  As a young man he worked as a shepherd and farmhand, and was largely self-educated through reading.  He was a friend of many of the great writers of his day, including Sir Walter Scott, of whom he later wrote an unauthorized biography.  He became widely known as the "Ettrick Shepherd", a nickname under which some of his works were published, and the character name he was given in the widely read series "Noctes Ambrosianae", published in "Blackwood's Magazine".  He is best known today for his novel "The Private Memoirs and Confessions of a Justified Sinner".  His other works include the long poem "The Queen's Wake" (1813), his collection of songs "Jacobite Reliques" (1819), and his two novels "The Three Perils of Man" (1822), and "The Three Perils of Woman" (1823).

Tom Cruise: An Unauthorized Biography: Tom Cruise: An Unauthorized Biography is a biography of actor Tom Cruise, written by Andrew Morton.  The book was published in the United States in hardcover format on January 15, 2008 by St. Martin's Press, with a first printing of 400,000 copies, and an audio format on five CDs by Macmillan Audio.

Katharine the Great: Katharine the Great: Katharine Graham and The Washington Post is an unauthorized biography of Katharine Graham, the newspaper owner, authored by Deborah Davis, and initially released in 1979.

Hammer of the Gods (book): Hammer of the Gods is a book written by music journalist Stephen Davis, published in 1985.  It is an unauthorized biography of the English rock band Led Zeppelin.  After its release it became a "New York Times" bestseller paperback, and is hyped by its publisher as being the best-known Led Zeppelin biography.  It has been reprinted three times since its first publication and has been released under the alternative title Hammer of the Gods: The Led Zeppelin Saga.  The title is derived from a line in "Immigrant Song", a track from the band's third album.

Brandon Stickney: Brandon M. Stickney (born 1967 in Lockport, New York) is an American journalist and author.  He was a newspaper reporter at the Lockport Union-Sun & Journal from 1990–1995.  He is also the author of "All-American Monster: The Unauthorized Biography of Timothy McVeigh".  Stickney has written about the Seven Sutherland Sisters.

Ronald B. Scott: Ronald Bruce Scott (born 4 October 1945) is an American author, journalist, pundit and former staff writer for "Time Magazine".  He is best known for his 2011 unauthorized biography of Mitt Romney, which is written from the point of view of a highly critical but fellow member of the The Church of Jesus Christ of Latter-day Saints (LDS Church), and his 2012 book "Closing Circles: Caught in the Everlasting Mormon Moment".

Katharine Graham: Katharine Meyer Graham (June 16, 1917 – July 17, 2001) was an American publisher.  She led her family's newspaper, "The Washington Post", for more than two decades, overseeing its most famous period, the Watergate coverage that eventually led to the resignation of President Richard Nixon.  Her memoir, "Personal History", won the Pulitzer Prize in 1998.

Jim Brochu: Jim Brochu (born August 16, 1946) is an American actor, writer, director, and playwright.  Born in Brooklyn, he studied at Carnegie-Mellon University and received his B.A. from St. Francis College.  His stage debut was in a production of William Shakespeare's "Taming of the Shrew".  A friend of Lucille Ball, he is known as the author of the unauthorized biography "Lucy in the Afternoon", and in this capacity, appeared on an episode of "MythBusters".

The Family: The Real Story of the Bush Dynasty: The Family: The Real Story of the Bush Dynasty is an unauthorized biography of the Bush family by the American investigative journalist Kitty Kelley.  It was published on September 14, 2004, less than two months before the 2004 US Presidential election.  Reviews of the book were mixed, with some of the "accusations," according to the New York Times, "[standing] up better than others."

Supporting paragraphs: Katharine the Great Katharine Graham
Answer: Katharine Graham