Captain Belval, learning of a threat to his beloved nurse Little Mother Coralie, rescues her from her would-be assailants and is promptly dragged into a plot involving her husband and millions of francs worth of gold. As layer upon layer of conspiracy emerges with no obvious thread to follow, there's only one man who can be counted on to uncover the truth. The Golden Triangle (also known as The Return of Arsène Lupin) is set a couple of years after the events of 813.
It was published in 1917 in both the original French and this English translation, and was the first Arsène Lupin novel penned by Maurice Leblanc since The Crystal Stopper in 1912.
