Worlds Colliding (Supernatural) Book Five

Catty Winchester is "the vessel". Michael's vessel.
Sam Winchester is "the vessel". Lucifer's vessel.
Dean Winchester is doing whatever it takes to keep his siblings from their "fates" and "destinies".
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 the life.
Castiel is a fugitive among the Angels.
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 that God doesn't care, will it lead to Ava's complete alienation from the Angels?
The Apocalypse is here. Michael is in the wind. Lucifer is bold and ready.
And the only ones who can stop it are Sam, Dean, Catty, Ness, Bobby, Castiel and Octavia.
But will they be enough to stop it all, or will they all die trying?