As a designer, I prefer to source the images for the covers. But clients don't always want me to do this. Sometimes I am given images that were chosen by either the publisher or author. In these situations, I consider myself the hands for their vision. These are a few of the covers I have done where such an arrangement was made.
This is a cover I did for Breakwater Books.
A cover for Palimpsest Press, in which the author chose the image.
A cover for Wolsak & Wynn