This is volume three of Shadowmarch.

Southmarch Castle is about to be caught between two enemies, the immortal Quar and the insane god king, the Autarch of Xis. Meanwhile, its defenders, the king's two children, Briony and Barrick are trapped away from home and fighting for their lives while something is awakening beneath the castle, something powerful, terrible, something that the world has not seen for thousands of years.  Barrick and Briony must gather their tiny group of loyal supporters and find a way to save their world or face a new age of unending darkness.

This is truly an epic fantasy in Williams' typical manner, with lots of interesting characters, an intricate storyline and lots of action. Williams fans should rush out and grab this one and enjoy it. ~~ Pam Allan

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