This volume brings together the current research on all aspects of lignins, the second most abundant group of biopolymers. It covers recent progress in elucidating some of the more intractable aspects of lignin preparation. Among the topics covered in its 41 chapters are: various methods for studying the structure of lignins; discussions of polymer products derived from the modification of lignin; water-soluble polymers; organosolv pulping, wood adhesives, and enzymatic lignin modification; and various products from lignins, including polyols, polyurethanes, polyblends, grafts, epoxies, and acrylics.