Hilary Spurling is the author of The Unknown Matisse , the first half of her award-winning biography of the artist. Her other biographies include Iny: The Life of Ivy Compton-Burnett ; Paul Scott: A Life; La Grande Therese : The Greatest Scandal of the Century and The Girl from the Fiction Department: A Portrait of Sonia Orwell . She is a regular book reviewer for the Observer and lives in London .