This was a fantastic book.  Yolanda, her brother Andrew and her mother move from inner-city Chicago to Michigan.  There, Yolanda must re-establish her reputation as a tough, not to be messed with girl.  She also has to look out for her little brother Andrew, who communicates to the world with his harmonica.  But when Yolanda is busy with a new friend and Andrew is harmed, she know that it is up to her to make things right again.

There are some fantastic themes developed in this book: Friendship, family, loyalty, honesty, communication, love.  Through it all, Yolanda is convinced that her brother is a genius, and she will stop at nothing to prove it to the world.  This would be a great read-aloud in a fourth or fifth grade classroom.