One Crazy Summer, by Rita Williams-Garcia

In the summer of 1968 three sisters go to spend a summer with their mother in Oakland. They’ve never met her before, and all of them have a hard time finding out where a trio of young girls fits in with the Black Panther Party she's become a part of. Their relationship grows profoundly against this historically important backdrop, and it’s an amazing, complex novel that explains intense subjects in ways perfect for middle-grade readers.