This book covers the political and legal implications of the United Kingdom's decision to leave the European Union. Structured in four parts, the book covers the background of how Brexit came to be, the implications of Brexit on the constitutional structure of the UK, and also the EU, and finally how the EU project can go forward beyond Brexit. The book that you have in your hands is the first comprehensive study that makes it easier for the reader to comprehend the complexity of the law and politics of Brexit. It is an indispensable compendium of knowledge on all key substantial issues that will impinge on the new post-Brexit settlement in Britain and in the European Union.