Guardians of Horsa. 5, Into the Hidden World

What is found was not always lost. When the Guardians embarked on their legendary quest, they never meant to discover a whole new world. But suddenly they find themselves among icy woods, glittering caves, and creatures unlike any they've seen before in Horsa. The only hope of returning home is to learn the secrets of this strange, hidden realm...and face the monsters within it. --Back cover.