Who authored the book series whose movie version starred Shefali Chowdhury?
Shefali Chowdhury: Shefali Chowdhury (Bengali: শেফালী চৌধুরী ; born 20 June 1988) is a British actress of Bangladeshi descent best known for playing the role of Parvati Patil in the "Harry Potter" film series, except for "Harry Potter and the Prisoner of Azkaban" (2004), in which the character is played by Sitara Shah. Harry Potter and the Prisoner of Azkaban (film):  It is based on the novel of the same name by J. K. Rowling.
J. K. Rowling