King of the Wind, by Marguerite Henry, was published in 1948 by Simon & Schuster.
When Agba, a simple horse boy in the royal stables of the Moroccan court, is selected to accompany his stallion to France he is beside himself with pride. Sham, along with five other horses, is the golden bay named for the Arabian sun, and meant to sire a stronger race of horses throughout Europe. But when Sham and Agba arrive, the king sees them as nothing more than a carthorse and his charge and sends them away. Bound by the orders of the Sultan, Agba knows he must protect the pedigree of Sham at all costs. A duty that will change the history of thoroughbred horses—forever.