Borderlands, boundaries and frontiers are crucibles for diverse cultures and multiple alternative histories. Nowhere is this truer than in the debateable lands between nation states in what is commonly known as the British Isles. This collection takes the reader on an imaginative journey inside the borders, offering a fresh perspective on the liminality of these porous and contested terrains and the liminal peoples therein.Implicitly or explicitly, the contributors to this volume, in one way or another acknowledge that the term ‘borderland’ is imprecise, ambiguous and never neutral, and due to its liminal status, a crucible for multiple and competing identities. As the essays in this collection show, these borders don’t have to be geographical, but can extend to any cultural, psychic or social terrain which exists beyond or between accepted categories, power structures, nations or states. This collection concerns itself with Borders Theory in its multifarious manifestations from pre-history to the present day.Border Crossings draws together a number of key researchers in their respective fields and enables a dialogue between different disciplines and theoreticians. More generally, in its disciplinary and theoretical scope, the collection links with a number of other works, whilst its focus on England, Ireland and Scotland maintains its distinctiveness and addresses an area of comparative critical neglect.