FREE: Elfstones on Shannara

Here is what is says on the back. "the magical Ellcrys tree is dying, loosening the spell bars demons from enacting vengeance upon the land. Now Wil Ohmsford must guard the Elven girl Amberle on a perilous quest as she carries one of the Ellcrys seeds to a mysterious place where it can be quickened into a powerful new force. But dark on their trail comes the Reaper, most fearsome of all Demons, aiming to crush their mission at any cost.

Could you possibly provide a more detailed description?