Deathwinds — Arthur Wiederhold

Thule is once again at war. The years of peace have been shattered as armies from the distant past appear from nowhere and begin to attack everyone and everything they encounter. But Thule isn't the only nation threatened by these time-traveling soldiers. As the messages pour in from nations as far away as Europe, Arka-Dal realizes that the entire world is in jeopardy. He now has to find out what is bringing these ancient warriors into the Second Age and put an end to the madness before the entire universe comes crashing down.