Marguerite Henry

The author tells, from the point of view of Annie Johnston, the story of this Nevada woman and her fight to protect the American wild horse, the mustang, from extinction because of professional killers who chased the horses for use in dog food.

Twin brothers, Justin and Joey, buy and raise a pony of their own but when the pony foals they find themselves responsible for the care of a whole new pony family.

In pre-Civil War Wyoming, a teen-ager's life is complicated when his strangely hostile father trades the boy's beloved horse to the pony express.

Molly wants a horse of her own, but when her father's mare gives birth to a mule, Molly changes her mind and raises the newborn.