The book "Innovation in General Purpose Technologies: How Knowledge Gains when It Is Shared" by Nina Teichert examines the various aspects of knowledge creation and transfer in the context of general purpose technologies. It particularly uses nanotechnology as an example to illustrate the dynamics and challenges in this field. The focus is on the composition of knowledge and the associated knowledge spillovers that are significant for innovation capacity. Additionally, the role of collaboration and knowledge exchange within innovator networks is emphasized to analyze the practical impacts of these interactions on the innovation process. Thus, the book provides valuable insights into the mechanisms that promote the growth and dissemination of knowledge in technological contexts.