Book excerpt: This Palgrave Handbook examines the ways in which researchers and practitioners theorise, analyse, produce and make use of testimony. It explores the full range of testimony in the public sphere, including perpetrator testimony, testimony presented through social media and virtual reality. A growing body of research shows how complex and multi-layered testimony can be, how much this complexity adds to our understanding of our past, and how creators and users of testimony have their own complex purposes. These advances indicate that many of our existing assumptions about testimony and models for working with it need to be revisited. The purpose of this Palgrave Handbook is to do just that by bringing together a wide range of disciplinary, theoretical, methodological, and practice-based perspectives.