Yea! Now that you mention it..
Sara Douglass' "The Wayfarer Redemption". Were they not selling two different sets of books( same story) but depicting different covers?? I mean i almost bought two of the same. Really, it was frustrating!! I had begun to think that their were three series, until I finally picked up the books(one by one) and took a good look! I really enjoyed the trilogy, but haven't read any of her other books!!