The book "Rethink! Prototyping" offers a comprehensive analysis of the outcomes that have emerged from the interaction and collaboration between various scientific actors. The authors reflect on different prototyping concepts and examine the transformation of the development culture shaped by the fusion of these concepts into hybrid approaches and solutions. In an era where the products of tomorrow are increasingly multifunctional and interactive systems, the necessity for interdisciplinary collaboration is emphasized to manage the complexity of these designs. The book is based on a transdisciplinary project that has explored innovative approaches to prototyping in order to support and optimize the development of these systems.