Classic books would be the easiest (and less-expensive options). Plot summaries are easily found so you could make the decision on what you think is "adult" content. B&N Classics are ~2$ (occasionally free) and come annotated. She could start with:
I personally would not purchase a nook for my child or teen for one reason and one reason only--the erotica easily seen in graphic book covers and book descriptions you can find frequently in the "Shop" section. Barnes and Noble needs to fix this--especially when they're marketing their new NOOKcolor to children with their NOOKbooks for kids. A genre block would be nice!
I feel your pain! My daughter is the same way. She reads constantly! She could easily read high school books, but she's 10. She really wanted an e-reader for Christmas, so I started the research. Hours later it came down to 2, the Nook and the Sony Touch PRS 600. Both are capable of getting library books which was the most important. We ended up with the Sony for her specifically because there is NO wifi. She can only get the books that I put on there. We purchased it refurbished at the Sony store for about $100. (I am getting a Nook though )
A lot of the classics are great, especially because they are free. Other books that have gone over really well is the Percy Jackson series.
another good series. Kid spies!
Both of these are going onto her Sony for Christmas
My daughter is the same way. She's in 3rd grade (4th next year!), but reading at the 6th-7th grade level - although there are many books deemed 6th-7th grade that I won't allow her to read due to the mature subject matter. She got a nook from my mother-in-law for Christmas and LOVES it.
Anyway, I have a separate BN.Com account for her - and she does NOT have the password, so she can't shop to her heart's content (it happened once - it's REALLY easy to purchase books on the nook!). If she wants a book, she adds it to her wishlist. I look at her wishlist periodically by logging into the separate BN.Com account and by a few for her. My parents recently sent her a nook gift card which we added to her account, so now we talk about her wishlist before I click to purchase it. She is learning about budgeting the money she has left on the gift card (which is reloadable - like an iTunes account) for the ebooks she wants more than others.
BUT, I do watch the Free Fridays books - sometimes they're appropriate for kids - and browse the nookBooks for Kids section on BN.Com to see if there's something she might like. Then we make the choice together, which gives us more bonding time. I'll take all the bonding time I can get before she hits those teenage years!
Simply put - she LOVES her nook. I think it might be the best Christmas present she's ever received!
If I might, I'd like to suggest my series of children's stories and books - "The Traveling Salesman's Darktime Tales". They're based on stories I told my own children when they were younger and are appropriate for kids 8 and up. The stories are about a traveling salesman who's also a wizard of sorts. He travels from place to place selling magical items, helping townspeople, and fighting magical creatures of every kind.
These are not Harry Potter type books that require a huge time investment from the child, rather they are a series of short/medium length stories that a child can read in a day or two. There's plenty of action and adventure, but without the intensity of more adult fare.
Here's a few of the stories available for the Nook (the Anthology is probably the best place to start and the most cost effective):
I hope your daughter enjoys them!
In Memory of Dad If you are looking for an inspirational or meaningful book for your child, please consider my ebook! It is only 99 cents, but has gotten great reviews, including recommendations from children's counselors and therapists. This book is one that anyone who has lost a loved one can relate to. Even adults have said they loved the story and were deeply touched by it.