Shields-Swann: A Mystery- dj variants?

I'm wondering if there are variants to the dj of Carol Shield's
"Swann:a mystery". That was the title of the true first edition published
in Toronto by Stoddart, later editions were simply "Swann".
One dealer has a picture of a dj which has the line "winner of the crime
writers arthur ellis award". Since this award is given for the best in
category published in the previous year, I've got to think this is a
second state (is that the proper term?) dj.
Can anyone help me out here?
Matthew Hill