"A Book Which Every Student of the Theory of Sovereignty Must Read" Mattern illuminates his subject through a rich historical survey ranging from Bodin and Hobbes to Laski, Kelsen and Willoughby. "Dr. Mattern's book is a contribution of value to the theory of sovereignty. (...) [He] has written a book which every student of the theory of sovereignty must read: it and Professor Hsiao's are the two most useful expositions of which the reviewer knows.": George E.G. Catlin, Cornell Law Quarterly 14 (1928-29) 409-411. xix, 200 pp.