Book excerpt: This volume concentrates on the attributes, requirements and applications of spectroscopic techniques in process analysis, considering off-line and at-/near-line methodology, in addition to on-line, in-line and non-invasive approaches. At a time when cost- and time-effective process spectroscopy is becoming an issue of increasing importance within the chemical industry, this volume provides a valuable source of up-to-date information on technological advances in the area. It complements more general works on process analytical chemistry.