A collection of printed works that primarily focus on the rules and principles that govern the relations between nations, including treaties, customs, and legal precedents. These books may delve into various aspects of international law, such as human rights, trade, or environmental regulations. This category can also encompass books on the graphical representation of information, particularly in terms of layout, typography, and images, as well as culinary literature featuring recipes, cooking techniques, and food-related narratives. Other related works in this category include books providing comprehensive and detailed information about legal systems, principles, and procedures, as well as a broad range of non-fictional texts encompassing various genres and subjects.