Tomographic imaging of seismic velocities is probably the most novel application of the seismic method to high resolution exploration and monitoring of the subsurface. It is a pleasure to make available a comprehensive state-of-the-art book giving an excellent overview of seismic tomography explaining the current status of the method, describing it and evaluating the possibilities and the potential for future developments.The book covers a wide range of applications of seismic tomography in geotechnological and geoscientific investigations, in particular for engineering and exploration. The intent to be practical is well met with many field examples and problems, without neglecting the basic principles needed to understand the examples more deeply and to judge the quality of the imaging. A very comprehensive list of references to specific and general publications on the subject allows access to more detailed information.Bodo Lehmann has succeeded very well in making seismic tomography understandable and useful to the geoscientific and geoengineering community and beyond. This is the most comprehensive book currently available on seismic tomography. It is suitable not only for professional geophysicists, geologists and engineers but also for study at the graduate level.