As the first and only open-access peer-reviewed academic journal about the landscapes, monuments and material culture of frontiers and borderlands in deep-time historical perspective, the Offa's Dyke Journal (ODJ) has a concerted focus on the Anglo-Welsh borderlands given its sponsorship from the University of Chester and the Offa's Dyke Association in support of the Offa's Dyke Collaboratory. Yet ODJ also provides a venue for original research on frontiers and borderlands in broader and comparative perspective. While Offa's Dyke and Wat's Dyke remain key foci, the contents of volumes 1 and 2 together illustrate the wider themes, debates and investigations encapsulated by ODJ concerning boundaries and barriers, edges and peripheries, from prehistory through to recent times, as well as considerations of the public archaeology and heritage of frontiers and borderlands.