Gold Medal Summer by Donna Freitas
I thoroughly enjoyed this book as someone who always sort of wanted to be a gymnast, but was scared to do cartwheels. Nice, sweet, believable realistic fiction.
The Encyclopedia of Me by Karen Rivers
Again, great realistic fiction. It will move you and make you laugh. Possibly at the same time.
And I will throw in two classics for this age groups that your daughter (and you!) should give a try:
(Okay, I mean classics in a very loose sense.)
A Crooked Kind of Perfect by Linda Urban
Every Soul A Star by Wendy Mass
Buy them for Christmas! Your girls will love them.
And here are four Cinderella books for girls of all ages. My absolute four favorite retellings...
Smoky Mountain Rose: An Appalachian Cinderella by Alan Schroeder
The Golden Sandal: A Middle Eastern Cinderella by Rebecca Hickox
The Rough Face Girl by Rafe Martin