The Sword of Shannara
The other plot shadows Prince Balinor Buckhannah's attempt to oust his insane brother Palance from the throne of Callahorn while the country and its capital ( Tyrsis ) come under attack from overwhelming armies of the Warlock Lord . 
<triplet> Balinor Buckhannah <subj> Palance <obj> part of the series <subj> Callahorn <obj> part of the series