This book provides a comprehensive overview of the rapidly expanding field of decentralized finance (DF) and discusses how entrepreneurs can leverage it in their business activities. Decentralized finance (DF) is a system for exchanging value without centralized intermediaries. It relies heavily on peer-to-peer lending and borrowing, decentralized exchanges, trustless systems, and blockchain. Decentralized Finance is seen as a disruptive technology that could replace traditional financial systems in the future due to its advantages of being inclusive, non-discriminatory, resilient to risk management failures, cost-effective for lenders and borrowers to access the system and more efficient in terms of financial intermediation through automated trustless systems.  This book explains the challenges and opportunities that these blockchain-based financial innovations present for both entrepreneurship and the broader financial system.