New York : Little, Brown, 2012.
1st U.S. ed.
330 p. : ill. ; 19 cm.
Translation of: Geister Ritter.
Eleven-year-old Jon Whitcroft and new friend Ella summon the ghost of Sir William Longspee, who may be able to protect Jon from a group of ghosts that threatens him harm from the day he arrives at Salisbury Cathedral's boarding school. Includes historical notes.