Allie eventually makes believers of the people around her and exposes the killer and the sinister plan he is preparing for Fossil Glen. The whole story comes out in the end as Allie risks her life to bring out the truth. To find out if she survives or not you'll have to read it for yourself. The story is a murder mystery where the ghost is trying to tell Allie who killed her and wants Allie to expose the killer. This book is about a fantasy land where there is an upper forest and lower forest.
Upper forest is a tree where squirrels live.
They have never seen the humans who live in the lower forest. Lower forest is actually a town. Amber Padgett, not having very many adventures, climbed up the tree and made the squirrels think that they were going to be invaded. That is how the war between the forests starts. I think the main theme of the story is that wars don't need to start over stupid things.