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(CNN)Marley Dias says she was tired of reading books about "white boys and their dogs" in school.
So at the age of 11, she launched the campaign #1000BlackGirlBooks to identify books featuring people of color as protagonists.
Over the past three years, Dias has collected more than 11,000 books. She is in the process of donating all the books and has given more than half to what she describes as "predominantly black and underserved" communities in the US, Haiti, Ghana, Jamaica and the UK.
The young activist from New Jersey has even gone on to author her own book -- "Marley Dias Gets It Done" -- and is currently developing an app so kids can find "black girl books" more easily.
"I hope that my campaign will mean more opportunities for our stories to be told and for books with black girls as the main character to be put on bookshelves worldwide," she tells CNN.
Yet despite the young writer's best efforts, statistics suggest "black girl books" are still in short supply.
Just 9% of children's books published in the US in 2017 featured African or African American characters -- according to data from the Cooperative Children's Book Center (CCBC) which has been measuring representation in children's books since 1985.
While that figure appears small, it actually represents an improvement on previous years. In 2014, just 5% of children's books recorded by the CCBC included African or African American characters.