The Horn of Life is a novel written by Gertrude Atherton. The story is set in San Francisco during the early 1900s and follows the life of a young man named John Lawrence. John is a successful businessman who is deeply unhappy with his life and feels unfulfilled. He becomes obsessed with a mysterious woman named Madame de Staemer, who he believes holds the key to his happiness and purpose in life.As John's obsession with Madame de Staemer grows, he...