This book takes a quantitative approach to groundwater flow, aquifer properties, and aquifer test analysis. Chemical properties, hydrologic cycle, evolution of groundwater and resource evaluation are not discussed here. This book is intended for those who wish to gain a better understanding flow characteristics, steady-state, porous and fractured medium aquifer testing and analysis. The chapters on aquifer tests are well done especially the section on nonlinear flow where Darcy's law is inadequate for high Reynold's numbers. Many of the diagrams are hand-drawn. Overall a really good book. I would recommend it to those who want more than that found in the introductory hydrogeology texts.