Trading Places rethinks, develops, and tests design-driven practices and methods to engage with participation in public space and public issues. With this book we aim to help art and design researchers, students, practitioners, and the multiple stakeholders they collaborate with, to explore what participatory ways of working in our contemporary urban environment entail. Six approaches are discussed: intervention, performative mapping, play, data mining, modelling in dialogue, and curating. Each approach offers a different kind of logic and produces a different type of knowledge. Trading Places invites the reader to discover common ground, explore new territories, and exchange points of view - in short, to trade perspectives on issues of participation.