The Girl, the Queen and the Castle (Rhinna, Book 3)

Rhianna ventures into the secret passageways and hidden tunnels of the castle in order to save her kingdom from evil in this magical continuation of the Rhianna Chronicles.

Wild Magic is loose in the kingdom, and the Queen needs Rhianna at the Castle of Avalon. But the castle is full of secret passageways and hidden tunnels, and evil is closer than anyone thinks. Rhianna doesn't know if she's ready to face the ultimate challenge of her skill. But she doesn't have much of a choice, if the kingdom is to be saved!