Adding a link to this related thread: Book Recommendation: Orientation, by Allis Wade, which mentions a 10 year old reader.

Adding a link to this thread, Book recommendations: Appropriate adult fiction, which requests suggestions for an 11-year-old reader.

Adding a link to this thread, Book review for appropriate content?, which asks about appropriate content for a 9-year-old reader.

Adding a link to this thread, Classics for 10 yo, in the General Discussion forum.

Adding a link to the thread Bios, history poetry or political/social science.

Adding a link to the thread Books for 10yo who's read it all, in the General Discussion forum.