"Cottage Building in Cob, Pisé, Chalk and Clay: A Renaissance (2nd edition)" by Clough Williams-Ellis is a practical guide focused on alternative building materials, written in the early 20th century. The book addresses the pressing need for affordable housing amidst a shortage of traditional building materials following World War I. The primary subject matter revolves around methods of cottage construction using local, natural materials like cob and Pisé, with a particular emphasis on the latter as an innovative solution to contemporary architectural challenges. The opening of the text sets the stage by addressing the remarkable demand for cottage building in the wake of a housing crisis exacerbated by material shortages. Williams-Ellis offers an overview of Pisé de terre, a method of rammed earth construction that is increasingly capturing public interest. He discusses his early experiences with Pisé-building, including the challenges and successes he faced in implementing this ancient technique, which gained traction due to its affordability and sustainability. The author also hints at contemporary research and developments in Pisé construction, suggesting a renewed appreciation for these traditional techniques amid modern needs. (This is an automatically generated summary.)