Waiting on Wed: What's left of me by Kat Shang

Waiting on Wed is hosted by Jill over at Breaking The Spine

So what am I waiting on this week...

What's left of me by Kat Shang

Expected publication: September 18th 2012 by Harper

Eva and Addie started out the same way as everyone else—two souls woven together in one body, taking turns controlling their movements as they learned how to walk, how to sing, how to dance. But as they grew, so did the worried whispers. Why aren’t they settling? Why isn’t one of them fading? The doctors ran tests, the neighbors shied away, and their parents begged for more time. Finally Addie was pronounced healthy and Eva was declared gone. Except, she wasn’t…

For the past three years, Eva has clung to the remnants of her life. Only Addie knows she’s still there, trapped inside their body. Then one day, they discover there may be a way for Eva to move again. The risks are unimaginable–hybrids are considered a threat to society, so if they are caught, Addie and Eva will be locked away with the others. And yet…for a chance to smile, to twirl, to speak, Eva will do anything.

(US summary)

Why I'm waiting on this:
I'm a sucker for pretty covers and one's that are interesting and can catch my attention. This one did just that, and then I read the summary and it captured me. Two souls in one body?