In keeping with SSP&A’s commitment to further knowledge in our field, we are delighted to enable the download from this page the book, “Hydrogeology 101: Introduction to Groundwater Science and Engineering”. This text, authored by Dr. Neven Kresic, is being provided as a free-of-charge and technically accessible resource for an undergraduate level academic course in hydrogeology (also known as groundwater hydrology, geohydrology, and groundwater engineering) and also as a self-study guide for practitioners or those newer to the field.