This book is about Iranian boundaries at a time when crisis of various nature are occurring around Iran, especially in Iraq and Afghanistan, with immediate effect on the Iranian borderlands and substantial effect of Iran's relations with her neighbours. Furthermore, issues like the legal regime of the Caspian Sea and the UAE claims on the Iranian-owned and Iranian-held islands of Tunbs and Abu Musa in the Persian Gulf create a situation in Iran's neighbourhood, which influence her foreign relations and engage the country in matters of international importance. Occurrence of all these issues on and around the boundaries of Iran and a thorough study of the unexplored foundation and evolution of these issues within the framework of the study of the Iranian boundaries make this book timely, special, original, and important.