The Fey5 books in series
The Sacrifice Publisher's Summary
Legendary for their bloodlust, sorcery, and fierce, dark beauty, the Fey have swept across three continents and never face defeat. But now, in defiance of their Black King, the warrior-prince Rugar and his fearless daughter, Jewel, have marshaled an invasion farce to meet its ultimate challenge: Blue Isle, glistening beyond impregnable rocks and raging waters.
A people of simplicity and faith, untainted by intrigue, enchantment, or war, the Blue Islanders have never before been invaded. But their young prince, Nicholas, dreams of battle and will rally his countrymen against the onslaught of the Fey, even as the Islanders discover a deadly, undreamed-of power of their own. So begins a conflict that must ultimately destroy one race or the other - or both.