Priscilla Chan's grandfather died of cancer when she was in sixth grade; she found a cancer textbook and taught herself why he died

• Priscilla Chan was in sixth grade when the death of her grandfather from cancer changed the direction of her life.
• One morning, he dropped her off at her sixth-grade classroom, but by the time she returned home, he had died.
• Chan was left trying to understand how someone who had taken her to school that morning could suddenly be gone.