This collection gathers a variety of scholars representing various methodological perspectives and applying diverse critical lenses to analyze the idea of borders, borderlands, frontiers, and liminal space, as they are represented in literature and philosophy. The idea of the border and frontier is perhaps more important than ever: under the siege of COVID-19, with shattered illusions of a post-racial world, when a global effort is required as a response to a crisis that does not respect national or regional borders, we need to reconsider what frontiers and borders mean to us, and how to best understand them so that they do not divide, but point to areas of common knowledge, collective experiences, and shared humanity. Drawing upon examples from different continents (Africa, the Americas, Asia, and Europe) and from diverse specific places (such as the Mexico-US border, or the contested Palestinian frontiers), and using a variety of critical perspectives (evoking Gloria Anzaldua, Jorge Luis Borges, and Edward Said, for instance), this volume explores the idea of frontiers and borders in order to comment on their representations in literature, philosophy, music, and cinema, and on the human condition in general.