Inspired from the world renowned Sherlock Holmes series by Arthur Conan Doyle, this author introduced the sister of Sherlock and Mycroft Holmes, who is equally adept in the art of deduction, in a thrilling mistery novel series. The first book has been already made into a major motion film. Who is the author?

5 points

a) Agatha Christie

b)Nancy Springer

c)Patricia Highsmith

d) Charlotte Armstrong

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