Changespell Legacy: Changespell, Book 4 (Unabridged‪)‬

When Camolen's Council of Wizards is cut down by twisted magic, the only witness is a palomino stallion named Ramble. Convinced the twisted magic threatens Camolen, Carey, Anfeald's Head Courier, plans to question Ramble using the now-forbidden spell that can change the horse into a human - the same spell that turned Dun Lady's Jess from horse to human and took her to another world: the American Midwest.