Siege Of Dread (26th Mellon Chronicles)

Rivendell has always been a place of peace. When that tranquillity is threatened, it leads to a cascade of events that seek to destroy Aragorn's adopted family. Two mysterious figures from the past become suddenly important and in a bizarre twist of fate, Aragorn and Legolas find themselves faced with trying to save not only the future of Rivendell but the King of Mirkwood as well.