The editors sometimes have solicited ideas or suggestions from myself, Dayton, and Kevin (and also Marco on the Declassified
The editors have passed along some of those ideas to Doug Drexler, who then developed the art, with some notes from the editors on the early concept images. Usually by the time we writers have seen the finished cover art, they have been "done deals".
In the case of the cover for Reap the Whirlwind
, it was inspired by a scene from the book that I thought would be a good showcase for the previously unseen Archer
class of starship. I thought it would be a space scene, but the art arrived as a blue-sky image complete with a fire trail from the Sagittarius
's warp nacelle. I was so taken by the art that I actually rewrote the scene in question to match the cover art.