This book provides an introduction to the theory and methods of historical semantics. It gives a survey of the most important types of semantic innovation (metaphor, metonymy etc.), it describes typical paths and results of semantic change (polysemy, competition of lexical units, shifts of prototypical meaning), and it presents historical case studies on various fields of German vocabulary (from speech act verbs to forms of address). The book is designed for readers with no background knowledge of semantics and can be used for seminar discussion or self-study. It contains extensive exercises and suggestions for further reading.