I have only recently found out of the story behind the Polgár sisters' chess success, and I find it absolutely fascinating. This article describes how their father, László Polgár, used their upbringing as an experiment to show that genius can be created, being primarily a product of nurture, not nature.
I am especially fascinated by the youngest and strongest player of the sisters, Judit Polgár. I love that she chooses not play in women's-specific events or divisions. She is my newly adopted chess hero, and I plan to begin studying her games as much as I can.