The famous mystery writer, Gilbert Finch, is coming to Greenfield to speak at the library and the Aldens can't wait to meet him. When they go with Grandfather to pick Finch up at the train station, he is nowhere to be found. Henry, Jessie, Violet, and Benny need to solve this mystery quickly. Otherwise, Finch's archrival, Hubert VanBuren, will speak at the library instead of Finch