The book "The Microfinance Revolution: Volume 2. Lessons from Indonesia" explores how to provide financial services to people in need worldwide. It looks at how microfinance has grown over the past 20 years, focusing on Indonesia and other developing countries. The book explains why microfinance works well for helping the poor, unlike some other methods. It also discusses informal money lending, savings, and the success of Bank Rakyat Indonesia. Overall, the book offers valuable insights into the world of microfinance and its impact on communities in Africa, Asia, and Latin America.