Chapter 1 Introducing Digital Social Innovation in the City1.1 Digital Social Innovation: what is it and where it comes from1.2 Experimenting with Digital Social Innovation: global goals, local initiatives1.3 Expert's box "People-friendly City platform. Reloaded" (by Mark Dyer, Waikato University)2.1 The city as innovation embedding ecosystem2.2 Assets and obstacles to digital social innovation2.3 City box "Barcelona"2.4 Expert's box "Place-based Innovation" (by Alberto Cottica, Edgeryders)Chapter 3: In the innovators' shoes: communities, practices and pitfalls3.1 The world of innovators' communities3.2 Innovating in the urban agglomerate3.3 City box: "Warsaw"3.4 Expert's box: "Technologies for Good" (by Olly Zanetti, external consultant at Nesta)Chapter 4 Informality, transactionality, fluidity: a new urban governance model for/from digital socialinnovation4.1 Urban governance in commotion4.2 New actors, new assemblages, new practices4.3 City box: "Rome"Chapter 5 Into the dark side: criticalities and contestation5.1 The digital turn and its discontents5.2 Behind the technology veil: is the public at risk?5.3 City box: "Ghent"5.4 Expert's box: "The city is for the People" (by Karl-Filip Coenegrachts, City of People)Chapter 6 Spaces for innovation?6.1 Urban digital governance6.2 Towards the "internet of people"?6.3 Expert's box: "On the Digital Social Innovation manifesto" (by Antonella Passani, T6-Ecosystem