Foreword All across the world, technology transforms workplaces. In the indus­trial sectors, new manufacturing technologies such as internet of things and cyber-physical systems increase automation and further rationalisation. Service sectors are transformed by the use of apps, digital platforms, big data and artificial intelligence. New powerful transnational digital companies have emerged and begun to shape the global economy, with their“creative destruction” strategies of­ten clawing away at established labour rights. The new world of digital work is restructuring the power relationship between capital and labour. It has a marked effect on workers’ pow­er to negotiate decent working conditions and puts organised labour on the defensive as the trend towards informalised, precarious and delocalised work has been reinforced. This seems to suggest that labour power is shrinking. However, as with our previous project“Trade Unions in Transformation”, FES is interested in the strategic response of organised labour. We have thus examined how trade unions and new workers’ organisations build power to confront the new world of work. The articles we pres­ent in this booklet identify new approaches and strategies of unions and workers’ organisations. We thank all authors of the academic case studies for their rigour and willingness to connect empirical research of“work in progress” with our conceptual framework of the Power Resources Approach, and all journalists for capturing the essence of the findings into easily acces­sible stories. Tamara Gausi of Equal Times coordinated the work with the journalists and thus enabled us to provide you with this con­densed version of the researches. Furthermore, we are deeply indebt­6 Trade Unions in Transformation 4.0