Phantoms Can Be Murder by Connie Shelton (A Charlie Parker Mystery, Book 13) by Books In Motion.com

Charlie receives an enigmatic letter from her namesake aunt, her father's estranged sister whom she's never met. Soon she's off to England. In the charming medieval Suffolk town of Bury St. Edmunds it isnt only slightly-eccentric Aunt Louisas beliefs in the occult or her spooky haunted sites tours that pique Charlies interest. When a friend of Louisa's is plagued by a series of pranks, Charlie and Louisa offer to find out what's behind them. But Charlie soon discovers that something sinister is brewing and she finds herself drawn into an investigation of crimes that are far too real.