Generalised quantifier theory is a central topic in logic with important applications in semantics of natural language. Recent work in the application field has led to new logical questions and new theoretical developments, showing that quantifier theory is a truly interdisciplinary field. This volume presents contributions to quantifier theory and its applications and gives a good impression of the depth and diversity of recent work in the field. The book starts with a long introduction aimed at making the individual papers accessible to a wide audience of logicians and linguists.