After Monica Case discovers an old-fashioned doll in her room at the Chilleen Academy, she discovers it belonged to Allegra Chilleen, who died with her family in a fire many years before. Soon, the doll manifests its strange powers, and summons the ghost of Allegra herself.
Used availability for Lynn Beach's The Evil One
October 1991 : USA Turtleback
October 1991 : USA Paperback