Bana Alabed says she likes to read "to forget the war" around her, as Aleppo is regularly bombed.
Her mother Fatemah tweeted the author to say she had watched the films and Bana would like to read the novels.
JK Rowling responded and digital copies of the books have been sent to Bana, who has shared pictures of herself reading them on a mobile phone.
Bana lives with her brothers, mother and father in Aleppo