Book excerpt: This book is about the legal regulation of caste discrimination. It highlights the difficulty of capturing caste in international and domestic law, and suggests solutions. Its aim is to contribute to the task of understanding how to secure effective legal protection from and prevention of discrimination on grounds of caste, and why this is important and necessary. It does this by examining the legal conceptualization and regulation of caste as a social category and as a ground of discrimination, in international law and in two national jurisdictions (India and the UK), identifying their complexities, strengths, limitations and potential. Adopting a broadly chronological approach, the book aims to present an account of the role of law in the construction of caste inequality and discrimination, and the subsequent legal efforts to dismantle it. The book will be of value to lawyers and non-lawyers, academics and students of human rights, international law, equalities and discrimination, descent-based and caste-based discrimination, minority rights, and South Asia and its diaspora. It will be a resource for legal practitioners and those in the public and non-governmental sectors involved in the implementation, interpretation and enforcement of equality law in the UK – the first European country to introduce the word "caste" into domestic equality legislation – and in countries with South Asian diasporas such as the USA.