To the new student of international law, the subject can appear extremely complex: a system of laws created by states, international courts and tribunals operating at the national and global level. A clear guide to the subject is essential to ensure understanding. This handbook provides exactly that: written by an expert who both teaches and practises in the field, it focuses on what the law is; how it is created; and how it is applied to solve day-to-day problems. It offers a uniquely practical approach to the subject, giving it relevance and immediacy. The new edition retains a concise, user-friendly format allowing central principles such as jurisdiction and the law of treaties to be understood. In addition, it explores more specialised topics such as human rights, terrorism and the environment. This handbook is the ideal introduction for students new to international law.