The Soul's Mark: Changed - The Soul's Mark, #4

Ever since college student Amelia Caldwell moved to Willowberg, her life has been in turmoil. But with the evil vampire hunters no longer terrorizing the town, Willowberg is once again peaceful. With a little help from Mother Nature and a dream for a better future, Mitchell has found himself in a predicament-after eight hundred years of being immortal, he is now a human while his soulmate is a vampire.
Now all Amelia and Mitchell have to do is hide from the world until his body can handle the change. But when Mitchell gets a cold, all hell breaks loose. With an unexpected resistance rising, and an unexplained deadline from the spirits, Amelia realizes that this is a fight she cannot win alone. One thing is clear, though: to save Mitchell, he needs to change-again. But if he does, what chance does he have of surviving it?