内容简介：
Mrs. Griffin, the neighborhood mentor, is missing. Loved by all the children in her Harlem neighborhood, Mrs. Griffin invited them into her home and shared stories about famous people and events, taught them proper etiquette, nurtured their musical abilities, and cooked some of the most delicious meals they'd remember for years after. Where is she? Why has she failed to keep an important appointment? These questions trouble her most ardent admirers-Bobby Thompson, outgoing, persistent, and curious preteen, and Sonny Henderson also eleven, visually handicapped, intelligent and introspective. Together, these two eleven-year-old amateur sleuths set out to find Mrs. Griffin. 'Mrs. Griffin is Missing" is one of a trio of stories involving Bobby and Sonny. In another story, Bobby hears knocking coming from apartment 2C. Everyone knows that his neighbor lives alone and works during the day. Who is knocking and why only when Bobby is alone? Because no one believes him, it's up to Bobby to uncover the secret in apartment 2C. The last story, 'The Intruder," sends the duo hot on the trail of yet another mystery. Set in Harlem of the 1950's, it is a time of family, community, and suspense.