Katherine Schlick Noe's Something to Hold is a rare find in the children's literature scene. With one caveat (discussed below), I would wholeheartedly recommend this book to anyone interested in a realistic portrayal of American Indians, their life, culture, and land, as well as issues of racism, courage, and the forging of unlikely friendships.
I found Noe's book extremely moving (I admit to tearing up at the end), and also completely believable. Noe was inspired by her own childhood, some of which was spent as one of the only white kids on an Oregon reservation, but it's unclear how much of the story is exactly biographical. That's to her credit - nothing in the story sticks out to the reader as the "obviously fictional" part of the book. It's also worth pointing out that anyone can write about real events - but not everyone can do it in a way that is consistently convincing, engaging, and moving.
Kitty (the main character) is an admirable character, but still flawed enough to be believable. She proves to be a very brave girl who is willing to stand up for her friends and question others' racist ideas, so she's a good role model; she's nervous about fitting in and wants to be liked, so she's realistic.
Now, the one caveat - don't look for a well-rounded portrayal of Christian believers or beliefs here. The most prominent "Christian" character is an extremely strict, unfeeling teacher who reads Scriptures on diligence and stupidity in class as a tool of humiliation and explains away one notable student's suffering (both emotional and physical) as something of his own doing. Kitty's peers at Sunday school are either racist or openly condone racist comments. In short, and particularly because this book is for the 9 to 12 set, Noe's one-sided portrayal of Christians and their beliefs sets up a prejudice even as it seeks to battle a different one. It would have been helpful to me to have some counterpoint to the terrible "Christian" characters here - to show that these characters are so flawed because they are people, not because they profess to be Christians.
When my kids are old enough, I think this will be an excellent book for them, and an enjoyable one - as long as it comes with a chaser of William Wilberforce, Acts 17:26, Dorothy Day, etc...