This book presents the theory that the linguistic and cultural landscape of Europe north of the Alps and the Pyrenees was shaped in prehistoric times by the interaction of Indo-European speakers with speakers of languages related to Basque and to Semitic. These influences on the lexicon, grammar, and toponymy of the West Indo-European languages (with special focus on Germanic) are demonstrated in German and English research papers, provided here with summaries, commentaries, and a new introduction in English, and with general and etymological indexes.