Miss Mary Morstan has a strange story to tell.
Since her father disappeared, she has received a large pearl through the post on the same day, every year, for six years. Who is sending them? And what about her father's paper with the words 'The Sign of Four' written on it?
Sherlock Holmes alone can solve these mysteries.
CONAN DOYLE ARTHUR
Sir Arthur Conan Doyle Edimburgo, 1859- Crowborough, 1930 fue médico, novelista y un destacado miembro de los círculos espiritistas ingleses. Su primera obra sobre Sherlock Holmes fue Estudio en escarlata 1887 y, aparte de la famosa serie detectivesca, escribió novelas históricas e incluso teatro.