Roll of Thunder, Hear My Cry is a wonderful book! It's a classic in children's literature, and the author, Mildred Taylor, has written several sequels and one prequel. If this were my daughter, I would read the book aloud with her; reading it together would give you a chance to enjoy the cast of characters together, to laugh together, to get upset together, and to talk about the historical significance of the setting. I read this book either to or with my fifth grade classes for many years and I highly recommend it because the children in my class always loved it, and it's a book with a message. If you choose to follow up with any of the other books in the series, you might want to preread them for adult themes--so you'll be prepared to answer questions.
Other books my fifth graders enjoyed were: The Lion, the Witch and the Wardrobe (part of a great series by C.S.Lewis); Number the Stars by Lois Lowry; The Indian in the Cupboard series; Lloyd Alexander's The Chronicles of Prydain.