Whitestone helped Rubinstein to write the second volume of his autobiography, My Many Years, which he dedicated to her.
Rubinstein's original collaborator, Tony Madigan, whom he met in Marbella, transcribed the first phase of the book.Whitestone convened Remembering Rubinstein, a day of talks and concerts at the Royal Academy of Music on 22 January 2008, to honour the pianist "who once sold as many records as rock stars and was as much at ease in the White House as he was with his chums Picasso and Charlie Chaplin."
Lady Weidenfeld is a member of the International Advisory Board of the Jerusalem Music Centre and the Jerusalem Foundation, a member of the Board of Directors of the Arthur Rubinstein International Music Society, and a member of the Honorary Advisory Board of the Jewish Music Institute SOAS.
Lady Weidenfeld also is the manager of pianist Menahem Pressler.
Annabelle Whitestone was married to British publisher Lord Weidenfeld from 1992 until he died in 2016.