This book and the corresponding e-modules are the product of intensive inter- and transdisciplinary collaboration and intellectual exchange that received funding by the Erasmus+ Programme of the European Union as "PusH - Precarious Housing in Europe". Between 2019 and 2022, this Strategic Partnership united colleagues from seven institutions from both older and younger EU member states. It was coordinated by Leuphana University in Lüneburg, Germany. In addition to Leuphana's Center for the Study of Democracy, the consortium comprised four further institutions of higher education involved in undergraduate, graduate and postgraduate education - Utrecht's Department of Human Geography and Spatial Planning of the Faculty of Geosciences, Durham's Department of Geography, the IUAV in Venice hosting the "SSIIM UNESCO Chair on the Social and spatial inclusion of international migrants -Urban Policies and Practices" and the University for Continuing Education Krems with its cluster on social space based research in built environment. These universities were joined by two partners from Bulgaria and Hungary representing countries where informal and precarious housing is a long-standing phenomenon. The Centre for Economic and Regional Studies in Bu-dapest is a public research institute and the Open Society Institute in Sofia is a non-governmental, non-for-profit organization. Both have an established repu-tation for providing scientific evidence and policy advice on precarious housing.