This publication assists readers (be they academics, students, practitioners, experts or migrants themselves) to better orientate themselves in the web of norms and principles existing at the international level. The focus of the compendium is on bringing together a comprehensive compilation of universal instruments with varying degrees of legal force - from authoritative international treaties, through customary international law, to the sets of principles and guidelines, which, although non-binding, are nonetheless of clear contemporary relevance and can contribute to the progressive development of law in areas not covered by 'hard' norms.