This is book number 2 in the Miss Marple series.
A BBC Radio 4 full-cast dramatization starring June Whitfield as the sharp-witted spinster sleuth
Dolly Bantry, mistress of Gossington Hall, is enjoying a pleasant doze when suddenly her dreams take a strange turn. The housemaid Mary is telling her that there is a body in the library. As she wakes up, it turns out to be true but who is the strange young blonde sprawled on the library floor? Enter St. Mary Mead's resident sleuth, Miss Mary Marple.