The International Criminal Court is a controversial and important body within international law and is significantly growing in importance, particularly as other international criminal tribunals close down. After a decade of Court practice, this book takes stock of the activities of the International Criminal Court, identifying the key issues in need of potential reform. It provides a systematic and in-depth thematic account of the law and practice of the Court, including its changing context, the challenges it faces, and its overall contribution to international criminal law. The book is written by over forty leading practitioners and scholars from both inside and outside the Court. They provide an unparalleled insight into the Court as an institution, its jurisprudence, the impact of its activities, and its future development. The book is organised along six key themes: (i) the context of International Criminal Court investigations and prosecutions; (ii) the relationship of the Court to domestic jurisdictions; (iii) prosecutorial policy and practice; (iv) the applicable law; (v) fairness and expeditiousness of proceedings; and (vi) its impact and lessons learned.