The Key of the Keplian by Andre Norton; Lyn McConchie

Now comes a new trilogy that reveals long hidden secrets of the mysterious Witch World.

Battle Sisters

For time beyond memory, the fire-eyed Keplian horses have lured riders to their death, sating the blood lust of the Dark Tower. All Witch World knows that the hunted, hated beasts serve Evil-all except one young woman.

Fleeing her home after her beloved grandfather dies, the orphaned Navajo-Apache girl Eleeri follows an ancient and magical trail to Witch World. When she discovers the Keplian mare Tharna and her newborn colt in the hands of men eager to destroy them, Eleeri fights for their freedom. Running for their lives, psychic Eleeri and telepathic Tharna bond. And in a hidden canyon,they discover the awesome truth:

The Keplians were created to serve light, and to ride with humans

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