I'd like to recommend Molly Gloss' "The Hearts of Horses." Gloss tells a compelling tale set in WWI era Eastern Oregon. While the cover notes suggest that it is a "horse whisperer" type of tale, happily, that is not the case at all. Refreshingly, the main character is a tomboy and isn't "converted" at some point during the book but rather accepted in the community for both her horsemanship skills and her rock-solid character. Even more refreshingly, while the main character has undeniable skill with horses, she isn't able to solve every problem or rehabilitate every horse. "The Hearts of Horses" really gives the reader a feel for what this time period was like in the rural West, a very enjoyable read.