The Angel In The Window. The Keeper Chronicles, #3

Compassion has its price. The former archangel Gabriel's quiet, human life is shattered when his brother Michael delivers a dire warning. An ancient evil he spared has reawakened and is collecting archangels in order to bend mankind to her will. Raphael has alreadygone missing, but Michael knows her real target is Gabriel, who she's sworn to take revenge on. He orders his brother to stay hidden, but when Michael is the next to dissapear, Gabriel, as per usual, disobeys him.
His lover Evie, friend Abby Campbell, the Keeper of a holy Book of Knowledge, and her boyfriend Ryan Moss do whatever it takes to rescue the missing angels. Their attempt, however, fails when they discover the demon isn't killing them, but posing the helpless angels in macabre displays. With Gabriel severely wounded from their thwarted mission, they have no choice but to call on bigger guns to help-his dysfunctional celestial siblings, the archangels.
As the humans race to find a way to contain her growing army of followers, Gabriel and his youngest brother, Lucifer, have to put aside family differences and team up to end the demon or risk being pinned up in her twisted stained glass display. And even if they succeed, will it be enough to save Gabriel's life?