You may not know the name of Reynolds Stone, but it is almost impossible that you haven’t come across his designs. If you’re familiar with the masthead of the Economist or remember the clock on the top of the front page of the Times; if you’ve seen the colophon on a book published by the Folio Society or Hamish Hamilton or owned a Penguin edition of Shakespeare; if you’ve borrowed something from the London Library; if you had a £5 note in your wallet in the 1960s; if you’ve walked over the memorial to Winston Churchill on the floor of...