BBC: Edward VIII (1894 - 1972) - Biography of the only British sovereign to resign the crown voluntarily, Edward abdicated in 1936 (having reigned for less than 12 months) in order to marry the American divorcee Wallis Simpson. - http://www.bbc.co.uk/history/historic_figures/edward_viii_king.shtml
Edward VIII - Biography for the king of Great Britain and Ireland (1936), known in later years as the duke of Windsor; eldest son of George V. - http://www.factmonster.com/ce6/people/A0816798.html
Edward VIII Speech - Abdicating the Throne - Read the words Edward himself wrote to inform the nation of his decision to leave the throne for the woman he loved. - http://www.historyplace.com/speeches/edward.htm
Spectrum Biographies - Edward VIII - Tells about the only British monarch who voluntarily abdicated the throne. - http://www.incwell.com/Biographies/EdwardVIII.html
Edward VIII: British Monarchs - A brief look at the life of the king who reigned only eleven months. - http://www.britannia.com/history/monarchs/mon61.html