The Mediator: Shadowland by Meg Cabot

Suze sees dead people.

However, unlike the little kid in The Sixth Sense, Suze isn’t scared of ghosts. She finds them annoying, really. They come to her all the time asking for help, trying to resolve problems so they can pass on into the afterlife.

So when Suze moves from New York to Carmel, she figures its time to take a break from specters and enjoy the land of palm trees and sunny beaches. Then she finds the ghost of a very handsome cowboy living in her bedroom and the ghost of a psycho cheerleader possessing her new school. Looks like Suze has her work cut out for – again.

Suze does for ghosts what Buffy did for vampires: she talks nice for a while, but if the ghost gets nasty, she just might have to get a little rough. These books are perfect summer reading – funny, engaging, and just a little bit spooky.

P.S. - This series was written under two names: Meg Cabot, and Meg Cabot's pen name, Jenny Carroll. Kind of confusing, but just so you know....