Horse Diaries is a new series published by Random House. The 5th book entitled Golden Sun is about an Appaloosa.
His story is set with the Nez Perce Indians in the 1800's. The horse tells about his adventures with his boy, who wants to become a healer and goes on a vision quest to find his spirit guide.
Each book is about a different breed of horse, in a historical setting and told from the horse's point of view. There are Morgan, Quarter Horse, Lipizzaner, Icelandic and Arabian stories with more to come.
Check them all out!