How mining magnate Gina Rinehart amassed a $30 billion fortune to become Australia's richest person and earn a reputation for being highly litigious.BBC business editor Simon Jack and journalist Zing Tsjeng uncover a woman who has taken legal action against her father's widow, her own biographer and the biggest mining company in the world, and who has been sued by her own children, twice.They follow Rinehart's story from her outspoken father's discovery of huge deposits of iron ore in Western Australia to inheriting the business and turning it into a multi-billion dollar powerhouse. It's a story that takes in secessionist politics, indigenous land rights and lots and lots of family feuds.