This document provides the front matter for a book on selected topics in photonic crystals and metamaterials. It includes a foreword by Thomas Krauss praising the book for comprehensively covering this field from first principles to state-of-the-art applications. The preface written by the editors notes that advances in materials science have enabled novel artificial materials with anomalous electromagnetic properties not found in nature. The book aims to summarize both basic and advanced aspects of this rapidly developing interdisciplinary field.