The American Bioregional Library covers a land area of approximately 42,330,000 square kilometers (4,233,000,000 hectares / 10,461,000,000 acres) (Asia and Africa figures from Britannica/UN Statistics and continent aggregations from Wikipedia area data; Americas land area combined from North America ~24,230,000 km² and South America ~17,814,000 km²) (total aggregated from authoritative geographic sources) (Americas combined from encyclopedic land area tables)  Its coastlines extend tens of thousands of kilometers along the Arctic, Atlantic, Pacific, and Southern oceans, including the extensive coastlines of Canada, the United States, Mexico, Central America, the Caribbean, and South American nations (coastline figures widely reported in global geographic datasets and country-level data, e.g., Canada ~202,080 km coastline and aggregated coastal measurements from national geographies)  . This library organizes the continent into major bioregions such as the Arctic and Sub-Arctic, boreal forests, temperate woodlands, prairies and grasslands, the deserts of the southwest, tropical forests of Mesoamerica, the Amazon Basin, the Andean Highlands, and the Patagonian and southern coastal systems. Each bioregion contains its own cultural, linguistic, ecological, and artistic histories, including Inuit, Dene, Haudenosaunee, Lakota, Navajo, Maya, Quechua, Aymara, Mapuche, and many others. The African Bioregional Library encompasses roughly 30,365,000 square kilometers (3,036,500,000 hectares / 7,507,000,000 acres) and approximately 30,000 kilometers of coastline (land area from widely cited Britannica/UN Statistics Division data; coastline approximated from aggregated coastal measurements of African maritime boundaries). Its structure recognizes the Sahara and Sahel, the great savannas, the Congo basin rainforests, the East African highlands, the wetlands of the Nile and Niger systems, the Cape Floristic Region, and Madagascar. The diversity of cultures such as Tuareg, Fulani, Yoruba, Maasai, Shona, Berber, San, and others is placed in relation to water cycles, grazing systems, ritual arts, agriculture, and cosmological worldviews. The Asian Bioregional Library encompasses more than 44,614,000 square kilometers (4,461,400,000 hectares / 11,024,000,000 acres) of territory, extending from Arctic tundra to tropical equatorial forests, with nearly 63,000 kilometers of coastline (area from Britannica/UN Statistics Division land area figures). It includes Siberian tundra zones, Central Asian steppe systems, the Himalayan mountain complex, the deserts of the Gobi and Central Asia, the fertile temperate forests, the Southeast Asian rainforest archipelagos, and extended island systems. Cultures such as Ainu, Kazakh, Tibetan, Sherpa, Hmong, Orang Asli, and many more are studied in connection with pilgrimage routes, trade networks, subsistence strategies, and artistic systems. The Oceanic Bioregional Library integrates around 8,510,926 square kilometers (851,092,600 hectares / 2,103,000,000 acres) of land distributed across thousands of islands within vast ocean domains, where coastal, coral, reef, lagoon, and atoll ecosystems dominate (land area for Oceania, including Australasia, Melanesia, Micronesia, and Polynesia from Britannica/UN data). It documents Pacific and Indian Ocean traditions, including Aboriginal Australian, Māori, Samoan, Fijian, Tongan, and Micronesian communities. It always relates them to navigation, cosmology, fisheries, the arts of carving and chant, and ecological resilience. The Antarctic Bioregional Library covers approximately 14,200,000 square kilometers (1,420,000,000 hectares / 3,511,000,000 acres) of ice-dominated land, with no permanent native human societies, focusing instead on scientific research, climate systems, wildlife dynamics such as penguins, seals, and krill, and global oceanic interactions (Antarctic land area from Britannica/UN data). Finally, the European Bioregional Library incorporates roughly 10,000,000 square kilometers (1,000,000,000 hectares / 2,471,000,000 acres) of land and approximately 38,000 kilometers of coastline (Europe land area from Britannica/UN data; aggregated coastline measurements from geographic sources). It identifies Nordic tundra, alpine mountain systems, temperate forests, Mediterranean biomes and steppe margins, examining indigenous and ancestral cultural continuities such as Sámi, Basque, Celtic and Slavic communities, alongside landscape transformations, environmental pressures and cultural revival movements.