Fabrizio Cleri received his doctor's degree in Physics from the University of Perugia, Italy in 1984 and his Habilitation in Physics (HDR) from the University Louis Pasteur in Strasbourg in 2004. After 20 years spent at ENEA in Rome, he became full professor at the University of Lille I and Director of Research at IEMN-Cnrs in Lille in 2006. Fabrizio Cleri is the founder and director of biennial Master studies in Biological and Medical Physics in the Department of Physics in Lille. His teaching covers both introductory-level and advanced courses in Condensed Matter Physics and Biophysics, as well as Applied Nuclear Physics for medical physicists. Author of more than 120 scientific papers and more than 50 invited talks, with over 3000 citations, his skills as a theoretical physicist range from nuclear and radiation physics, to condensed-matter physics and materials mechanics, to molecular physics, biophysics and bio-nanotechnology. He gave major contributions to the understanding of micromechanical phenomena and charge/heat transport processes in nanomaterials and biological molecules. Since 1986, he has been an invited professor at the CEA of Cadarache, at MIT in Boston, at the KITP of UC Santa Barbara, California, at Rensselaer Polytechnic Institute, Troy, New York, at the Institute of Industrial Sciences at the University of Tokyo, as well as permanent researcher at Argonne National Laboratory in Chicago between 1995 and 1998. He was an Associate Editor of Applied Physics Letters until 2016 and of the European Physical Journal B until 2014, and since 2014 serves as AE of the European Physical Journal E.  The author is maintaining a website at physicsoflife.net which contains many additional resources for both the students and the instructors: • high-resolution version of all non-copyrighted images in various formats, including OpenOffice slides; • more complete solutions to all the end-of-chapter problems, as well as additional “questions-and-answers” students’ self-examination checklists; • a set of C++ computer programs for some of the mathematical models described in the book.