"Harry’s life finally seems to be calming down. The White Council’s war with the vampiric Red Court is easing up, no one’s tried to kill him lately, and his eager apprentice is starting to learn real magic. For once, the future looks fairly bright. But the past casts one hell of a long shadow. Mab, monarch of the Sidhe Winter Court, calls in an old favor from Harry. Just one small favor he can’t refuse...one that will trap Harry Dresden...

In all his years of supernatural sleuthing, Harry Dresden has never faced anything like this: the spirit world's gone postal. These ghosts are tormented, violent, and deadly. Someone-or something-is purposely stirring them up to wreak unearthly havoc. But why? If Harry doesn't figure it out soon, he could wind up a ghost himself.

"Harry has faced terrible odds before. He has a long history of fighting enemies above his weight class. The Red Court of vampires. The fallen angels of the Order of the Blackened Denarius. The Outsiders. But this time it’s different. A being more powerful and dangerous on an order of magnitude beyond what the world has seen in a millennium is coming. And she’s bringing an army. The Last Titan has declared war on the city of Chicago, and has come...