El secreto del rey (El Sendero del Guardabosques 2)

Darthor, the Dark Lord of Ice, is drawing ever closer to dethroning King Uthar. He has invaded the kingdom, accompanied by ice savages, snow trolls, ogres, half-giants, and colossal creatures unlike anything anyone has ever seen. Meanwhile, Lasgol and his companions face their second year at camp, striving to become rangers. However, they too will not escape the war and its dangers, and will find themselves caught in situations that will test not only the skills they have learned, but also the lives of them all.