I have two suggestions, but I'm not sure what reading level they are considered to be. I've always read way outside of my reading level. (The Help) and (Kindred) are the two best books I've ever read. They both have African American girls in them and are amazing. You can look up a summary on them and if it doesn't fit your reading level, then I'm sorry! :)

Zilpha Keatley Snyder, The Egypt Game
Mildred D. Taylor, Roll of Thunder, Hear My Cry
and, for ages 13 and up: Melissa Mather, One Summer In Between

I Know Why the Caged Bird Sings by Maya Angelou.

Phillip Hall Likes Me, I Reckon Maybe

I really liked "Fires of Jubilee" by Alison Hart when I was around that age.
I also enjoyed the American Girl "Addy" series, featuring an African American girl.

I hope this helps!

Words By Heart by Ouida Sebesstyen

Parable Of The Sower, by Octavia Butler

the last safe house

Love Knots and Love Knots, Two Truths are two ebooks I think you'll enjoy reading.

The Queen Bee of Bridgeton by Leslie DuBois
The Apocalypse Gene by Suki Michelle and Carlyle Clark

Chains by Laurie Halse Anderson
Taking Liberty (I don't know the author, sorry)

Taking Liberty is by Ann Rinaldi

It is a toucing story, but it is a picture book about a young girl and her take on life... "Something Beautiful" very sweet book.