The romance of the Duke and Duchess of Windsor has been called the greatest love story of the 20th Century. But with the recent release of previously declassified secret intelligence files and extensive research by the author Charles Higham, a darker side to their forty-year relationship has since been uncovered. Wallis throws new light on how without the aid of beauty, money or background the illegitimate Bessie Wallis Warfield from Baltimore came to marry the world's most eligible bachelor. It reveals how the amorous techniques she learnt in China awakened the Duke's dormant sexuality and left him helpless in her power and details her involvement in international espionage, to include her treacherous attempts to bring about the fall of Britain to Hitler. But, most sensationally of all, it provides a new insight into her recently disclosed love affairs, including the motor salesman Guy Marcus Trundle, and provides a wealth of information about the government, the royal family and the secret intelligence service all of which has recently become available to author Charles Higham since the book's first publication.