Above the icy darkness of Owlswater, the Lord Owl plots his final victory... Riverbourne is in terrible danger. The Lord Owl's power is spreading through the land like a sickness. Vair and his friends have no choice; they must march north to Owlswater and face the Lord Owl. But evil has come closer than they realized, and Vair may be too late. Can the brave young pine marten save Riverbourne -- and find the true heir of the eagle kings? Book jacket.