This book provides the basic principles of engineering geology, focusing on the study of rock and soil properties and their impact on engineering projects such as buildings, bridges, roads, and dams. It discusses how geological factors influence the design and construction of engineering works and offers tools and techniques for assessing geological hazards like landslides and earthquakes. The book also covers methods for field data collection, geological classification, and modern technologies used in engineering geology to ensure the safety and stability of engineering structures.