Cloud Castles

Twice before Stephen Fisher has set sail upon the Spiralthat shifting melee of Space and Time that abuts accepted reality at ancient, hidden places. Once he was drawn in by chance, another time by need. Now great and terrible forces older than humankind are calling him back once more.
The known world begins to fall apart on the day Stephen is rightfully recognized as head of a giant multinational industry. Magically fortified boundaries have been breached, forbidden thresholds crossed...and demons are descending en masse upon Europe. Malevolent beings from both within the Spiral and without have conspired to spill monsters into the Core - to spread fear and hatred and death...to destroy for the sake of destruction alone. And this unrelenting wave of horrors is but a harbinger of even greater terrors yet to come.
A veteran of countless battles in realms of shadow and myth, Stephen must now reenter the Spiral to confront the root cause of the dread infestation - as the sinister machinations of a scheming necromancer lead the unwitting executive to a fabled city in the clouds...and to the awesome archetypal power that dwells within. For evil gods are gathering on a faraway mountaintop in preparation for their final Grand Sabbat. And at the head of an army of timeless warriors, in the deafening tumult of a thousand insanities, Stephen Fisher will at last fulfill the destiny that is in his blood and in his name - as he takes up arms against the overwhelming forces of darkness to heal a wounded land.
Cloud Castles is the concluding volume of Michael Scott Rohan's acclaimed Spiral series - the adventures of Stephen Fisher begun in Chase the Morning and continued in The Gates of Noon.