20th Century Pewter: Art Nouveau To Modernism, by Paul Carter Robinson, is a history of modern pewter objects from Europe, America, and Japan. The book's glossy photographs (mostly of Art Nouveau works from the 1900s) are its main attraction, though it also profiles significant pewter manufacturers and designers. Whereas earlier studies focused on more functional pewter items, Robinson emphasises its use as a medium for decorative objects and ornaments.
Vanessa Brett's Phaidon Guide To Pewter (1981) is a survey of European and American pewter since the seventeenth century, ending with a chapter titled Art Nouveau To Contemporary. Robinson's book is essentially an expanded treatment of the material in that chapter. He discusses German and British pewter in considerable detail, and also covers pewter from France, Holland, Austria, Scandinavia, America, and (briefly) Japan. Gabriele Sterner's Pewter Through 500 Years (1979) has a useful annotated bibliography.