Ironcrown Moon - Julian May

The continuation of a powerful new fantasy adventure filled with dark magic and deadly intrigue, from the worldwide bestselling author of the SAGA OF THE PLIOCENE EXILE.
King Conrig Ironcrown now rules the entire island of High Blenholme. But the peace he achieved after ruthlessly uniting its four quarrelling kingdoms into a Sovereignty is about to be challenged by enemies both mortal and supernatural.
Rumours abound that his vengeful first wife, Maudrayne, believed to have committed suicide when she discovered his infidelity, is in fact still alive and about to reveal a secret that could cost Conrig his throne.
A more tangible threat is posed by the ambitious sorcerer Beynor, and his crony, Conrig's traitorous former alchymist Kilian, who have stolen a trove of currently inactive moonstones capable of drawing tremendous power from the mysterious supernatural Beaconfolk. After initiating a civil war, the pair hope to utilize this power to vanquish...