'This concise, yet almost encyclopedic collection of essays will help readers cut through the breathtaking complexity of Brexit as it relates to the most difficult issue of Northern Ireland. With outstanding entries on the relevant procedures, institutions, and concepts, as well as a host of substantive sectors, this volume will become an indispensable legal handbook for the generation that must now grapple with untangling the UK from Europe while keeping further troubles at bay.' Daniel Halberstam, Eric Stein Collegiate Professor of Law and Director of the European Legal Studies Program at the University of Michigan Law School