A sequence of lively anecdotes from a mercurial mind: Gekoski has led several careers, as a publisher and more recently as a fine novelist; he is also the doyen of dealers in rare modern first editions. Golding, Greene, Rushdie, Plath’s copy of ‘The Great Gatsby’ (reclaimed by Ted Hughes), vanishing copies of ‘Ulysses’… A Rowling manuscript draws him out on the relationship between value and worth. Funny and shrewd.