Invisible Giants is a book about leadership, choices in life and the potential within everyone to make a difference. Lindsay Levin, who founded the social enterprise Leaders' Quest in 2001, tells the remarkable stories of some of the people she has met through her work, and their impact on the world. These 'invisible giants' are grassroots leaders who have overcome numerous hardships to re-energise their communities, and business leaders who strive to integrate purpose alongside profit. They are female activists in slums campaigning to end the exclusion of girls from school, and environmentalists who are tackling the effects of industrialisation on the world's ecosystem. They are also the people we meet every day, who are revisiting their life choices. Inspiring and moving, this is also the story of Lindsay's own quest - to ask 'What really matters?' and figure out where the answers can take her.