"Partner Choice and Cooperation in Networks" is a scholarly book that addresses the challenges and opportunities of cooperation in networks. It highlights the difficulties that arise when individual interests conflict with common goals, particularly in areas such as the exchange of goods, knowledge, and information, as well as in negotiations regarding environmental issues and the use of shared resources. The book introduces a model that takes partner choice in social dilemmas into account and examines how this choice influences the dynamics of cooperation. By employing formal game theory, experimental economics, and computer simulations, it demonstrates that the possibility of partner choice significantly enhances cooperation and leads to the formation of networks where free riders are more likely to be excluded. The insights from this study provide valuable understanding of the mechanisms of collaboration in complex social structures.