This volume introduces the notion of 'relational planning' through a collection of theoretical and empirical contributions that explore the making of heterogeneous associations in the planning practice. The analytical concept builds on recent approaches to complexity and materiality in planning theory by drawing on Science and Technology Studies (STS) of urban issues. It frames planning as a socio-material practice taking place within the multifaceted relations between artefacts, agency and practices. By way of this triad, spatial planning is not studied as a given, linear or technical...