Silver and the Ghost Horse Book 3

In Silver and the Ghost Horse, Book 3 of Saladin series, Angie and her wonder horse Silver plunge into another dangerous adventure when a sly counselor and a giant soldier decide to destroy the camp of Robin Hood.
The giant soldier, Buck Bains, and the counselor work with the evil Prince John to create a super army to find Angie, force her to bring them to the camp to arrest Robin Hood, and bring Angie and the two wonder horses, Saladin and Silver to the Prince.