High Druid of Shannara (Abridged)3 books in series
Jarka Ruus Publisher's Summary
Among the highest ranks of the Council she leads lurk those who cannot forget her reign of terror as the Isle Witch, who covet her seat of power, and who will stop at nothing to see her deposed - or destroyed. Even Grianne's few allies - chief among them her trusted servant Tagwen - know of the lots against her. But they could never anticipate the sudden, ominous disappearance of the Ard Rhys, in the dead of the night without a trace.
Now, barely a step ahead of the dark forces bent on stopping him, Tagwen joins Grianne's brave young nephew Penderrin Olmsford, and the wise, powerful elf Ahren Elessedil on a desperate and dangerous mission of search and rescue - to deliver the High Druid of Shannara from an unspeakable fate.