The Castle of Llyr

The third book in Lloyd Alexander's Chronicles of Prydain series follows Princess Eilonwy as she is sent to the Isle of Mona to learn proper ladylike behavior, but becomes entangled in ancient magic and danger. When Eilonwy is kidnapped and her magical powers are threatened by the evil enchantress Achren, Taran and his companions must rescue her from the mysterious Castle of Llyr. The story explores themes of friendship, courage, and the struggle between good and evil, while Eilonwy grapples with her identity as both a princess and a wielder of ancient magic. Based on Welsh mythology, the book features a diverse cast of characters from the fantasy realm of Prydain.