The photo on the cover was taken of the exact beach as described in the opening chapter, but under different weather circumstances. Nevertheless, as one of the bodies was removed from the scene in a small rowing boat, it was sheer coincidence that one such appeared in the photo. After watching the man walk onto the beach and ready his rowing boat, a woman with two dogs was strolling along, right in the way, and I didn't think that she would have been out-of-shot in time to catch the deserted beach and the oarsman, but I was lucky.
Again, the story began as a picture in my mind of that beach, (which we have taken the kids and grandkids to, many times), with bad weather, and someone walking their dog, and finding a body part. Most body parts, like hands, feet, ears, eyes, etc; have been found on beaches, but never a man's penis; so I thought, why not let the dog find a penis on the beach?
It's a great story, well worth reading, and you don't need to own a Kindle to download it - as the tips on this page have all the answers -