She has written biographies of
Beryl Markham,
Amelia Earhart,
Amy Elizabeth Thorpe,
Jane Digby,
Richard and
Isabel Burton, the
Mitford Girls,
Bess of Hardwick,
the Churchills, and
Maxine Elliott. Her book on Markham,
Straight on Till Morning, researched and written in under a year, after weeks of interviews with the subject in
Nairobi, became an immediate international bestseller when it was published in 1987 and was twelve weeks on the
New York Times Best Seller list. She also wrote
The Mitford Girls (titled
The Sisters in the USA), a biography of the celebrated
Mitford sisters, first published in September 2001 (paperback August 2002), and her
Bess of Hardwick, was published in the UK in 2005.
The Churchills, her biography of the
Churchill family from the
1st Duke Marlborough to the present generation, was published in April 2011 in the UK and May 2011 in the U.S.A. The paperback was released April/May 2012. ==Adaptations==