Complex sentence: Griffin enrolled in the College for Financial Planning in Denver, Colorado, became a Certified Financial Planner in 1989, and described the U.S. money system in his 1993 movie and 1994 book on the Federal Reserve System, "The Creature from Jekyll Island".
Split into simpler sentences: Griffin enrolled in the College for Financial Planning in Denver, Colorado. He became a Certified Financial Planner in 1989, and described the U.S. money system in his 1993 movie and 1994 book on the Federal Reserve System, "The Creature from Jekyll Island".