In the middle is the Australian cover. The first thing that jumps out at me is how pretty it is, with the soft, dreamy colors. The more I look at this cover, the more I like it, especially with the distortion to show how she forgets everything as she sleeps. This is my favorite cover of the bunch.
At the right is the UK version. The stormy background is pretty neat, as is the concept of the "past" and "future" selves colliding, but I don't like this cover as much. There's nothing really wrong with it; it just doesn't illustrate the tone of the novel to me.
Finally at the bottom is the French cover. The title is very cool, and I like those little, uh, things (I can't really tell what they are, haha) swirling between the two T's, but the purple shading makes the model look like a fairy. This seems like it would be a good cover for a paranormal or traditional urban fantasy instead of however Forgotten is classified as.
What's your favorite cover for this book? Least favorite?