The ten chapters of this textbook, written in a simple but scientific language, encompass all the non-thermal treatments in-depth, from basic concepts to technological advances. The book provides complete study material in a single source including such pedagogical features as multiple-choice questions, solved numerical problems, and short questions. The book begins with a general introduction to the evolution of the non-thermal technique for food preservation. The fundamental mechanism of thermal inactivation of microorganisms and enzymes is discussed. In the following chapters, a set of seven non-thermal techniques have been discussed in detail.