The aim of the book is to put researchers engaged in different areas of research on a common platform so as to be benefited by the current state of knowledge in the field of this subject. The field of chemical ecology as such is relatively young, but it has experienced a very rapid growth in the past few decades, primarily fueled by more readily available chemical analytical and molecular methods. This, on one hand, explains the limited number of concise textbooks in this field, but on the other hand, it also explains the increasing impact and explanatory power chemical ecology has in almost all fields of ecology, evolutionary biology, and biochemistry.