This book introduces computable contracts, also referred to as smart legal contracts. It emphasizes the integration of legal text with machine-readable data and executable logic as a solution to inefficiencies in contract management. It also explores the application of large language models (LLMs) and natural language processing (NLP) for computable contracts. A new maturity model gives a roadmap that emphasizes progressive stages of technological integration and sophistication, providing a structured approach for organizations to adopt and evolve their contract management systems. The book is presented by Accord Project, a non-profit initiative developing an ecosystem and open-source tools for computable contracts. The community includes participants from law firms, technology companies, universities, government, and private individuals. Foreword by Dr. Megan Ma, Assistant Director at the Stanford Center for Legal Informatics (CodeX).