New York: Doubleday, Page, 1907. First Edition. A key early work by Sinclair, supplying a sort of non-fiction sequel to his The Jungle, which had been published a year earlier. In the current work Sinclair analyzes present economic conditions,concentrating on wage-slavery and concentration of wealth, and predicts an inevitable social and economic revolution. Ahouse calls this the first of Sinclair's "book-length essays...the same sort of popularized economic analysis later found...in Book of Life, Letters to Judd, The Way Out," etc. Includes a promotional chapter on Helicon Hall, Sinclair's ill-fated experiment in cooperative living (the Hall burned to the ground shortly before the book went to press). AHOUSE A9. Octavo. Red cloth boards, blocked in gilt and white on spine and front cover; xiv, 284pp; 8 inserted leaves of plates (halftones). Moderately rubbed and worn; thin split to front hinge at frontispiece; a few pages with sharp slices in margin (presumably from opening); complete and Good, but best considered as a reading copy.