Does she like horses? How about horse stories? You'd have to research each title as horse stories sometimes end in some sort of tragedy and I can't recall which do and don't.
Marguerite Henry wrote: Misty of Chincoteague and also San Domingo, Medicine Hat Stallion, Stormy, Misty's foal, Brighty of the Grand Canyon. My Friend Flicka, different author, has a good ending. There are probably a lot of more recent ones that are equally good or better, but at least books published 50 years ago or more tend to have reasonable content.
Polly
