The book "Letters from a self-made merchant to his son. Letters written by John Graham, manager of the firm of Graham & Co., butchers of Chicago, known on the stock exchange as "Old Gorgon Graham," to his son Pierrepont, humorously known as "The Younger Hormone" is a unique domestic document of the times of prosaicism. The author of these letters, George Horace Lorimer, reveals to the reader important life advice and financial principles that help his son to understand the world of business and achieve success. This book serves as an excellent source of wise advice and instructions that are still relevant today, because the principles of success remain unchanged regardless of time."