She has far exceeded her goal, with almost 4,000 books and counting. Now, she wants to set up a black girl book club and pressure school districts to change what books are assigned to students. Morning Edition's David Greene spoke with Marley about her campaign and how she's handled her success.

The thing NPR Ed wanted to know? Her take on a subject she now knows well: books about black girls. Here are her top five picks.

Brown Girl Dreaming: by Jacqueline Woodson

Age Level: Grades 6-8

Genre: Autobiography

Why Marley recommends it: "It's definitely one of my favorites, mainly because I am a very avid reader and it was one of the first books I ever had a challenge reading. I know that sounds not really good because then you couldn't understand it. But it was like the first time that I ever fully had to wait and think through something and take my time, which I think is definitely something important because you have to be patient."

"It's also a poetry book and I think that poetry is cool even though I don't really write poetry that much. I do think it's cool to read it. And it's a very important book and there's a lot of themes in the book. There's a lot of ways to interpret it, but it's about the '60s and '70s and Jim Crow laws in South Carolina and New York and how a girl talks about her family and racism and how they experience it."

One Crazy Summer: by Rita Williams-Garcia

Age Level: Grades 3-5

Genre: Historical Fiction

Why Marley recommends it: "The black girls that I know ... thought that this was one of the best books about black girls. I haven't finished reading it yet. I know it's kind of disappointing that I haven't read one of the most popular books that we've been getting. It's about three girls who go to see their mother, who they haven't seen ever since they were babies babies. So, they go to visit the summer with her and they have a whole giant adventure."

President of the Whole Fifth Grade: by Sherri Winston

Age Level: Grades 3-5

Genre: Fiction

Why Marley recommends it: "It's about a girl named Brianna Justice who runs for fifth-grade president." Marley explains the main character is following in the footsteps of her role model, "who's a cupcake baker from the same town in Michigan that she's from. So, it's about her whole journey to become president of the whole fifth grade. It's a series and there's President of the Whole Sixth Grade as well."

Roll of Thunder, Hear My Cry: by Mildred D. Taylor

Age Level: Grades 5-8

Genre: Historical Fiction, classical

Why Marley recommends it: "I like this one because it's a classic book in general and it's one of the most famous black girl books ever. The main character, she's very independent. She's very strong. She's very family-oriented and she protects her family. So, that's definitely one of the main things that the book is popular for. It has a very important life lesson: to be protective of the things you have, even though you might not be 100 percent grateful for it and to always stand up for what you believe in, even if you're the only one. So, I think those are definitely good themes that could help girls — and boys — learn how to represent their voices when there's a problem."

Please, Baby, Please: by Spike Lee, Tonya Lewis Lee and Kadir Nelson

Age Level: Ages 2-5

Genre: Comedy

Why Marley recommends it: When it comes to books for little kids, Marley has a tie: Please, Baby, Please and Please, Puppy, Please. "They're really funny and sweet little books about a baby who is being a little trouble maker and then about a dog who's being a little trouble maker. They're funny and they're sweet and kids enjoy them."