Derek Landy, Philip Reeve, Joseph Delaney, Susan Cooper, Eleanor Updale, Jamila Gavin, Mal Peet, Matt Haig, Berlie Doherty, Robin Jarvis and Sam Llewellyn have come together to bring you eleven ghost stories: from a ghost walk around York; to a drowned boy, who\'s determined to find someone to play with; to a lost child trapped in a mirror, ready t...