The Chronicles of Narnia- the Royals Return

book 3 in 3
this book follows the return of Emily, Edmund, Eustace, Lucy, Susan and Peter to Narnia [before the silver chair]. they return 6 months [1 and a half years in Narnia] to find Narnia is... fine. Caspian is fine nothing is different. except Emily. She is different. she is now becoming cold. she starts to feel her heart braking. Narnia is the only place that can help. she she be saved or will Edmund's worst nightmear come true?

Not very well ended. Please send help!