It's Halloween on Mouse Island, and it seemed like everyone was out to get me, Geronimo Stilton! My cousin Trap kept pulling scary pranks on me. And then my sister Thea told me I had to write a book about Halloween in less than one day! Before you could say boo, my nephew Benjamin had dragged me to a graveyard to do research. There I met a very spooky mouse who -- yikes! -- tried to lock me up in her coffin! Oh, how would a 'fraidy mouse like me ever survive the year's scariest holiday?