Moore left his post as editor of "The Daily Telegraph" in 2003 to spend more time writing Thatcher's authorised biography. Always intended to be published after her death, the first volume, titled "Not For Turning", was published in 2013 shortly after her funeral. (The US edition of this initial volume was retitled "Margaret Thatcher, The Authorized Biography: From Grantham to the Falklands.") Moore does not know exactly why he was chosen to write the biography, but believes it was probably because of his age, and because he was familiar with all the main characters of Thatcher's time in government, without being especially strongly linked to any one of them. He was selected by Thatcher, without his prior knowledge, out of a list of names which were presented to her.