The textbook "Transport Modeling in Hydrogeochemical Systems" by J. David Logan provides a comprehensive introduction to the mathematical techniques and concepts that are significant in applied mathematics and hydrogeology. It aims to give both applied scientists and mathematicians a deeper understanding of the mathematical models used to describe and predict experimental results. The book highlights the challenges and opportunities arising from the connection between these two disciplines and promotes the exchange of ideas and methods. By presenting mathematical models that capture the essential features of physical systems, the reader is empowered to understand complex processes and interactions. The models presented are not only theoretical but also practically applicable, offering valuable insights into hydrogeochemistry.