Worlds Colliding (Supernatural, Book Five)

Catty Winchester is "the vessel". Michael's vessel.
Sam Winchester is Lucifer's vessel.
Dean and Scarlett Winchester are doing whatever it takes to keep their sister and brother from their "fates" and "destiny".
Sam and Scarlett are dealing with the aftermath of what they had done with Ruby and Zane, and trying to come to grips without their powers.
Ness and Bobby Singer are in for a hard, trying year this year, from beginning to end, that leads both of them to believe that maybe one or both of them should try to get out of this life.
Castiel and Angelos are fugitives amoung the Angels, getting more and more close to Catty and Scarlett respectively.
Octavia is kind of like their "double agent". Even if she doesn't have all of the powers she had before, she's still on the inside, and she is willing to help her friends. But when she finds out God doesn't care, will it lead to Ava's complete alienation from the Angels?
Zane is back from Hell. Again. And to make up for the wrongs he has done alongside Ruby, he is going undercover himself, working for and against the Demons and Lucifer, so he can make it up to the Winchesters, who can never be certain if he'll ever try to double cross or betray them again.
The Apocalypse is here. Michael is in the wind. Lucifer is bold and ready.
And the only ones who can stop it are Catty, Sam, Dean, Scarlett, Ness, Castiel, Octavia, Angelos, Bobby... and Zane?
But will they be enough to stop it all, or will they all die trying?