Colonel Mustard in the Library with the Candlestick

Who murdered the Head of Geography on the GCSE field trip? Surely not one of the students? Only the Wizard Firebrain can save Lord Oakheft's followers as they face a terrible doom, so why did he leave them for another other task? Who is the mysterious doctor who sends Morley to a hospital nobody has heard of, a place of nightmare and terror? (NB: it's best not to read this story too late at night!) What price must hopeless Norbert pay to be the best football referee in the entire Universe? (Be careful what you ask for, Norbert.) Each story has a twist and a shudder, written by an author the Times Educational Supplement called 'a specially talented yarnspinner.'