Start with high-confidence ya horse stories books, then narrow by subgenre or adjacent topics.
Black Horses for the King
Anne McCaffrey
A Horse of Her Own
Annie Wedekind
Shadow Horse
Alison Hart
Whirlwind
The Winter Horses
Philip Kerr
Thief of Happy Endings
Kristen Chandler
If Wishes Were Horses
Jean Slaughter Doty
The Valley of the Ponies
Christmas at Saddle Creek
Shelley Peterson
The Truth About Horses
Christy Cashman
Last Chance Joey
Meredith Resce
The Bloodwolf War
Paula Boer
