The Red Casket — Darby Karchut

Never trust a witch. For four hundred years, generations of the Family Del Toro and their battle-savvy warhorses have secretly guarded their corner of Colorado from all things creepy. But when a menacing woman with some wicked witch powers shows up at the Del Toro ranch and demands the return of the Red Casket, twelve year old Matt Del Toro must team up with his best friend Perry -- along with the warhorses Rigo and Isabel -- to out-wit, out-ride, and out-fight one Viking-size sorceress.