Henrik Smith obtained his mag. scient. degree in 1966 from the University of Copenhagen and spent the next few years as a postdoctoral fellow at Cornell University and as a visiting scientist at the Institute for Theoretical Physics, Helsinki. In 1972 he moved to the University of Copenhagen where he is now a professor at the Oersted Laboratory. He has also worked as a guest scientist at the Bell Laboratories, New Jersey. Professor Smith's research field is condensed matter physics and low-temperature physics including quantum liquids and the properties of superfluid 3He, transport properties of normal and superconducting metals, and two-dimensional electron systems. His other books include Transport Phenomena (1989) and Introduction to Quantum Mechanics (1991).