Book excerpt: This volume discusses the role and characteristics of Islamic finance and how it can contribute to a sustainable financial system. Islamic finance is not only for the 1.5 billion Muslims. Several countries are interested in it because it has interesting characteristics in terms of transparency and banking regulation. Although the origins of Islamic finance date back several centuries, its resurgence is relatively recent. From its modern beginnings in Egypt and Malaysia, Islamic finance is now a growing sector and its recent performance contrasts with that of conventional banks. Rapid growth and innovation are transforming the sector, driving economic development in an increasing number of jurisdictions, while also increasing the number of new opportunities and challenges. Today, with the problem of climate change and its adverse effects on the whole world, the flexibility of Islamic finance concerning the operations available to those who wish to finance the development of infrastructure, makes this area crucial for sustainable finance.