‘It is only with the heart that one can see clearly; what is essential is invisible to the eye.’ Words of advice from a wily desert fox to a little boy who fell to Earth from an asteroid. That quote, by the French author and pilot Antoine Saint-Exupery, is one of the most memorable passages from The Little Prince, a slim volume that is one of the most frequently translated books of all time and has achieved this in just 75 years since its first publication. But who was Saint-Exupery? How did he come to write The Little Prince? And what else do we know about this adventurer and romantic who risked his life as a pilot many times and captivated the world with his writing? Bridget Kendall is joined by Olivier d'Agay, great-nephew of the writer and Director of the Antoine de Saint-Exupery Estate and Youth Foundation, Stacy Schiff, Pulitzer-prize winning author of an acclaimed biography of Saint-Exupery, and Bernard Chabbert, pilot and historian of French aviation. Antoine de Saint-Exupery (Photo by Hulton Archive/Getty Images)