What's Left of Me: The Hybrid Chronicles, Book One (Audiobook) 2012

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...