Conversation so far:
what are the principles of the 7 habits
In The 7 Habits of Highly Effective People, Stephen Covey presents true north principles based on a character ethic that he presents as universal and timeless.
what is stephen covey's profession
Stephen Covey was an American educator, author, businessman, and keynote speaker.
when did stephen covey die
Stephen Covey died on July 16, 2012

Question: what was the cause of the author's death
Self-contained rewrite: what was the cause of stephen covey's death