The Secret of Killimooin is the fourth book in Enid Blyton’s Secret Series. When Mike, Nora, Peggy, and Jack visit Prince Paul’s castle in the remote mountains of Baronia, they uncover a hidden forest and a dangerous band of robbers. As they navigate secret passages and thrilling encounters, the young adventurers must outwit their enemies in this gripping mystery. Discover more at Best Book Centre.