Thrall: Twilight of the Aspects

Thrall: Twilight of the Aspects is the name of an upcoming World of Warcraft novel by Christie Golden. It appears to be a followup to Golden's book, The Shattering: Prelude to Cataclysm.

Description
When Azeroth was young, the noble titans appointed the five great dragonflights to safeguard the budding world. Each of the flights' leaders was imbued with a portion of the titans' vast cosmic powers. Together, these majestic Dragon Aspects committed themselves to thwarting any force that threatened the safety of the WORLD OF WARCRAFT.

Over ten thousand years ago, a betrayal by the maddened black Dragon Aspect, Deathwing, shattered the strength and unity of the dragonflights. His most recent assault on Azeroth—the Cataclysm—has left the world in turmoil. At the Maelstrom, the center of Azeroth's instability, former Horde warchief Thrall and other accomplished shaman struggle to keep the world from tearing apart in the wake of Deathwing's attack. Yet a battle also rages within Thrall regarding his new life in the shamanic Earthen Ring, hampering his normally unparalleled abilities.

Unable to focus on his duties, Thrall undertakes a seemingly menial task from an unexpected source: the mysterious green Dragon Aspect, Ysera. This humble endeavor soon becomes a journey spanning the lands of Azeroth and the timeways of history itself, bringing Thrall into contact with ancient dragonflights. Divided by conflict and mistrust, these dragons have become easy prey to a horrific new weapon unleashed by Deathwing's servants... a living nightmare engineered to exterminate Azeroth's winged guardians.

Of even greater concern is a bleak and terrifying possible future glimpsed by Ysera: the Hour of Twilight. Before this apocalyptic vision comes to pass, Thrall must purge his own doubts in order to discover his purpose in the world and aid Azeroth's dragonflights as they face the Twilight of the Aspects.

Excerpt
The Hour of Twilight. She'd spoken of it at the meeting, tried to warn the others of it, but the warning had gotten lost; a little bright fragment of... something... had been briskly swept away like a broken bit of pottery beneath an industrious broom. It was—

She gnawed her lower lip, thinking.

It was the greatest challenge the dragonflights would face, but she did not know against whom they would be fighting. It might come soon... or aeons from now. Could it have something to do with the return of Deathwing? Surely it had to... did it not? This breaking of the world was one of the worst things that had ever happened to Azeroth.

How could she persuade others of the direness of the situation when she herself could not articulate it? She uttered a little noise of annoyance and frustration.

One thing she knew for certain. There were many pieces missing from this puzzle, but there was one core piece that was necessary before any of the others could fall into place. It was a very strange piece, an unlikely one at best, and she was uncertain as to how he would fit in. She only knew that he had to.

Ysera had seen him, floating in and out of her dreaming. She had thought she understood his role in things, but now, peculiar as it seemed, something—some inner certainty that even she did not fully understand—was leading her to think she had not seen the full breadth of his contribution to Azeroth.

He was not a dragon. But he had the interests of the dragonflights in his heart—whether he knew it or not. He straddled worlds—but did not seek to rule or command or destroy them. He was unique.

She tilted her head, let the wind play with her long green hair. Perhaps that was why he fit in. Even the Aspects were not singular beings, although each had unique abilities. Not one but five there had been at the beginning, when the titans had come and shared their power for the good of Azeroth. Four there were now, but there would soon be five again, when the blues determined how to choose the one who would lead them.

But there was only one like this being.

There was only one Thrall.