This book develops and establishes knowledge about borderology in the border zone between different countries, cultures, and climatic environment. The content of border and border zone has, during our research, changed from being a physical border between states to different borders and border zones which also include social and mental borders. The COVID-19 pandemic has challenged the concept even more. The expressions “lockdown” and "social distance" indicate such borders that we, a short time ago, had largely not considered in our everyday life. Not only states closed their borders,...