Is this agency still open for business?
An invalid address annotation on P&E: http://anotherealm.com/prededitors/pealc.htm
One of the agencies agent: Amy J. Fastenberg
A writeup one the late Ms.Clausen:
There's a beautiful picture of the late Ms.Clausen in Wikipedia: http://en.wikipedia.org/wiki/Connie_Clausen
Mr. Stedman May founded his own agency, Scribblers House LLC, http://www.scribblershouse.net/
Here are 8 hits I found on Amazon: