William J. Smyth is the author of Mound-Builders. Publicly available information about his life is limited: his nationality, dates of birth and death, education, and professional career are not reliably documented. The library holds only one work by him, and no common classification is given for it. Judging from the surviving bibliographic record, his writing centers on the "mound builders" of North America as an archaeological and cultural subject, falling within history or archaeology written for general readers. Works of this kind typically use surviving earthworks as clues to introduce the social organization, religious customs, and engineering capabilities of the peoples concerned, and to survey scholarly explanations for their origins and decline. The book's specific contents and academic reception still require verification, and readers should check the original edition and publication details when citing it, so as to avoid confusing authors of the same name or similarly titled books.
