The Fairy Queen has given Arica a task of great importance. She must travel to South Bundelag, where the greedy humans live, in search of a valuable treasure: The Book of Fairies. It's a book that contains precious spells, the fairy laws -- even the names of all the living fairies. It's up to Arica to bring the book back safely. It doesn't help that her clumsy cousin, Connor, has followed her to Bundelag and the Fairy Queen has allowed him to stay. Or that Arica's horse is really Shadow in disguise. Shadow claims to be repentant. But can Arica really trust him, or will Shadow betray them all? Another exciting installment in The Unicorn series.