Download or read book Yesterday's Horses written by Jean Slaughter Doty and published by Simon & Schuster Books For Young Readers. This book was released on 1985 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: While riding in the mountains, Kelly finds an orphaned foal that seems to belong to a breed of wild horses supposedly extinct for thousands of years and which holds the secret to a modern medical mystery.