The Fox Valley Murders / The Pleasant Grove Murders

From Author Wars - https://authorwars.com/books/the-fox-valley-murders--the-pleasant-grove-murders-1152796.html

Overview:

Title: The Fox Valley Murders / The Pleasant Grove Murders
Author: Jack Vance
Year: 2005
Type: Omnibuses

Editions/Publications:

Unknown. The Fox Valley Murders / The Pleasant Grove Murders (Unknown, Jack Vance, Vance Integral Edition, ISBN-10: 0971237514, [viii]+492 pages, Hardcover, Omnibus)