She would probably love a boxed set of all seven Chronicles of Narnia...
http://www.amazon.com/gp/product/0060847131/sr=8-7/qid=1149127678/ref=pd_bbs_7/104-2595697-9215920?%5Fencoding=UTF8
...and, if she's reading at grade level or above, she's about right for "The Adventures of Huckleberry Finn".
http://www.amazon.com/gp/product/0142437174/qid=1149127852/sr=1-2/ref=sr_1_2/104-2595697-9215920?s=books&v=glance&n=283155
"Where The Red Fern Grows" is a book no child should miss reading. Get it in hardcover because she'll wear it out.
http://www.amazon.com/gp/product/0385323301/ref=ed_oe_h/104-2595697-9215920?%5Fencoding=UTF8
A really fun and morally instructional read is "By The Great Horn Spoon".
http://www.amazon.com/gp/product/0316286125/qid=1149128103/sr=2-1/ref=pd_bbs_b_2_1/104-2595697-9215920?s=books&v=glance&n=283155
Oh, yes, and absolutely do not pass up "Hans Brinker, or the silver Skates".
http://www.amazon.com/gp/product/0689849095/qid=1149128203/sr=2-1/ref=pd_bbs_b_2_1/104-2595697-9215920?s=books&v=glance&n=283155
...I'll keep my thinker running and, if I come up with more, Ill post them.
Ah, concur!
I loved the "Adventures of Huckleberry Finn" and "Tom Sawyer" at that age.
The Giver had a pro-life, pro-individuality bent to it - I liked it and so did my son in 6t grade.