The book "Applied Hydrogeology of Fractured Rocks" offers a comprehensive analysis of the hydrogeological properties of rocks, particularly concerning fractured rocks. Given the increasing scarcity and vulnerability of the Earth's water resources, hydrogeology is an increasingly relevant topic. The work addresses fundamental principles, exploration techniques, and assessment methods that are significant for understanding hydrogeology. Various aspects such as structural mapping, remote sensing, geophysical exploration, GIS, groundwater flow modeling, and contaminant transport are covered. Additionally, practical applications such as hydraulic field tests, groundwater quality, geothermal reservoirs, and aquifer management are discussed. The second edition of the book has been thoroughly revised and includes a new chapter, updated sections, and numerous new examples.