Conn authored books in his retirement, including The Sixth Sense, Prayer: Brain Cell Reformation (1916), For the Good of the World. Finding the Real God (1919), and The Wonder Book: How to Achieve Success (1923).
During his leisure time, Conn penned books such as The Sixth Sense, Prayer: Brain Cell Reformation (1916), For the Good of the World. Finding the Real God (1919), and The Wonder Book: How to Achieve Success (1923).