SHIELD'S LADY by Jayne Ann Krentz was originally published under the pseudonym Amanda Glass. I still have my copy with the original cover.
Sarianna was a cool, confident businesswoman, an outcast from the East determined to regain her rightful status. Gryph was an intense mercenary respected and feared throughout the opulent cities and savage frontiers of the West. But from the moment they met, fate made them one. Was it their destiny to be bound to a force that both captivated and frightened them?