Collaborative research approaches involving participatory aspects such as co-creation and co-production have increased in popularity both in academia and within a wide variety of professional contexts. This trend entails activating participatory ideals and approaches throughout public and private sectors, as well as within our civil societies, especially in a Nordic context. In this volume two in our series on co-creation and co-production, we are pleased to present fifteen articles that in various ways demonstrate practice and empirically based examples from research projects involving co-creation and co-production. What characterizes all these contributions is, on one hand, a normative hope and appreciation of collaborative research, and on the other, a critical awareness of the complexities, messiness, and power-struggles that inevitably impact parts of collaborative research processes. It is our hope that these articles will provide important inspiration and contribute to a nuanced discussion on collaborative research.