Mantles of Power: Omnibus

Just love it! We have angels, demons, good story and a very good xenophobic debate.
How easy is to go to war with others when you take the time to know them?!
Discovering through betrayal that those that are supposed to be your enemy can also be the ones that heal you. That's a quite interesting twist. And how being gentle and kind can go a long way.
I would love to know more about the story between some characters as well. Also, more explanation on how the mantles work.
I have ready all books by this author and loved all of them. Hope to have more soon.