Madeline, smallest and naughtiest of the twelve little charges of Miss Clavel, wakes up one night with an attack of appendicitis. Can a scaredy mouse like Geronimo survive the year's most terrifying holiday? Candied cheese treats! It was Halloween, the spookiest day of the year. And it seemed like everyone was out to play tricks on me, Geronimo Stilton. Things went from bad to worse when my nephew Benjamin dragged me to a graveyard to do research...