Epictetus' main work is the Enchirideon --or "Handbook", while his longer works are known as The Discourses. Like the other latin Stoics of his time, Epictetus focused on virtue and on being masters of our own lives.
Epictetus would love the Wikipedia:
See also: Stoicism
External links: Epictetus's writings can be found at the Internet Classics Archive: http://classics.mit.edu/Browse/browse-Epictetus