<div>This textbook on quantum mechanics has been designed for use in two-semester undergraduate courses. It describes the basic concepts of quantum mechanics, explains the use of the mathematical formalism and provides illustrative&nbsp;examples of both concepts and methods. Although the aim is to enable students to master the&nbsp;use of quantum mechanics as a tool, the author also discusses&nbsp;the meaning of quantum concepts. To this end the book contains a variety&nbsp;of relevant examples, worked out in considerable detail, as well as a&nbsp;substantial number of pertinent problems and exercises. The latter will be extremely helpful, if not essential, for gaining a deep understanding and command of the subject.&nbsp;This book is based on the author's thirty years experience of&nbsp;teaching the subject.</div>