The views of leading researchers on the emerging topic of post-mortem digital legacy and posthumous interaction are explored in this book which combines the technical, cultural and legal aspects associated with this new branch of HCI. The technical aspects of emerging technologies, both for the web and mobile platforms, are analysed and useful information is provided for system development, requirements engineering, and data management and storage. The authors address the cultural aspects of virtual identity, ethical problems, cross-culture differences regarding memories and death, bereavement, taboos and beliefs, and the visual/verbal representations of death. The legal aspects covered include regulation, property, privacy and conflicts between international and local jurisdictions. The coverage of Digital Legacy and Interaction: Post-Mortem Issues is relevant to the development of systems that consider the influence of death, bereavement and mortality on Human Computer Interaction. The interdisciplinary approach that guides this book is intended to foster enriching and innovative discussions amongst HCI scholars and professionals. Cristiano Maciel and Vinícius Carvalho Pereira are researchers at LAVI (Laboratory of Interactive Virtual Environments) and professors at UFMT (Federal University of Mato Grosso, Brazil).