WILLIAM CAMPBELL GAULT – County Kill. PI Brock (the Rock) Callahan #6. Simon & Schuster, hardcover, 1962. Charter, paperback, 1988.

   PI Brock (the Rock) Callahan’s client in this case is a small boy whose father has disappeared and (unknown to him) is suspected of murdering his partner in crime. What the crime is, nobody is saying, and the San Valdesto city police seem to be overly involved.

   Note the title. San Valdesto is a town split between millionaires on one side, and poverty row on the other. Everyone is very money conscious, and it interferes with the investigation. Callahan has the right instincts, however, and eventually they pay off.