Two concise summaries of that book are here:
Robert Nielsen, “Why Wages Don’t Fall During A Recession,” December 23, 2013.BIBLIOGRAPHY
Bryan Caplan, “Why Don’t Wages Fall During a Recession?: Q&A with me channeling Truman Bewley,” http://econlog.econlib.org/archives/2013/09/why_dont_wages.html
Bewley, T. F. 1999. Why Wages Don’t Fall During a Recession. Harvard University Press, Cambridge, MA.