Worlds Colliding (Supernatural, Book Seven)

The revelation of Castiel being controlled and manipulated into such things has shattered everyone involved.
Sam, Dean, Catty and Scarlett Winchester.
Ness and Bobby Singer.
And Octavia and Angelos the Angels.
Catty also realizes that Castiel hadn't been the only one who had been manipulated and used by Crowley, Zane and Balthazar. She realizes exactly what happened, and she is willing to o anything to try to fix it, even while grieving Castiel, Octavia and Angelos's deaths.
Scarlett realizes that she and Catty, and Angelos, were too used by Crowley, Zane and Balthazar, and the revelation of what the three of them used Catty, Castiel, Scarlett and Angelos to create shakes the world of Catty and Scar, who now have to find the creations without the help of Cas and Los due to the events of last book.
Dean is angry at Crowley, Zane and Balthazar. He is angry at Castiel for letting them get so far as to control him the way they had. He's angry that Octavia and Angelos died. He's angry at everything. But when Bobby dies, will he continue to fall part or be there for Ness?
Sam is going through his Hell Wall that is crumbling, and Octavia's death. What remains of his Hell Wall comes in a shape that surprises him. It's not only Lucifer that he sees.
Ness has always been the level-headed one. The one to go to when you need help for advice. But when her father, Bobby dies, what will this do to her, after she already lost Cas, Ava, Los, and so many other people due to Crowley, Zane and Balthazar? Will she be angry, devastated or revenge-driven? Or all of the above?
What happens when Catty and Scar find what they're looking for?
What happens when Ness gets her revenge?
What happens when people that they think are dead don't stay dead?
And who else will they lose?