The book "Galois Connections and Applications" offers a comprehensive examination of Galois connections, which play a fundamental role in logical and mathematical thinking. These connections enable a structure-preserving transition between two distinct but interconnected areas of thought. By considering Galois connections, it becomes clear how information about objects and their relationships in one area can be used to gain new insights in the other area. The work highlights the theoretical foundations and practical applications of these concepts, particularly in classical Galois theory and algebraic geometry. The authors K. Denecke, M. Erné, and S.L. Wismath present the topic in a clear and structured manner that is of interest to both students and professionals.