When Alfred Nobel died he famously left funds in his will for the creation of the various prizes which now bear his name. What most people don't know is that he also invited winners of the prizes to put forward a theory for the existence of Stonehenge. Who put these mysterious stones there? And why? In 'The Stonehenge Letters', Harry Karlinsky explores the background to this unusual request and shares the theories of Rudyard Kipling, Marie Curie, Albert Einstein and other well-known Nobel Prize winners. But is this fact or is it fiction?