My ten-year-old daughter's book "Undine" by Penni Russon.
Had to leave off reading "The Magic in the Weaving" by Tamora Pierce, another of my daughter's books, because Undine will have to go back to the library.
Not long ago I read all the Nania books (C.S.Lewis), and "National Velvet" (Enid Bagnold) as well.
There's a lot of good literature about for ten-year-old girls.