I find Britain's Green Rider series compulsively readable, and in the third book in the series, Britain is not afraid to go heavy on supernatural elements of her world. Just as action-based as the others, The High King's Tomb heavily focuses Karigan's fight against her feelings for King Zachary. Karigan's interesting mission adds an adversary that will play a bigger role in the forthcoming books. I also enjoyed seeing Karigan mature as a green rider as she mentors younger riders.