The Devil You Know

The stakes are higher than ever in this long-awaited finale of the Brimstone Angels series, starring tiefling heroine Farideh
 
An epic battle of good versus evil has erupted—one that is rife with deception and intrigue, and where the question is as much who is evil, as how they can be defeated. The stakes have never been higher. The fallout will shake the Hells, and through them, the Forgotten Realms.

Before Farideh took a devil's pact, before she was Chosen by the god-king of the Hells—before any of this started—there was Bryseis Kakistos, the original Brimstone Angel and the first of Farideh's line. Now in these final moments, Bryseis Kakistos is back. But this time around, she will not help the king of Hells achieve godhood—instead, she’s going to kill him. All she needs is a little help from Farideh.
 
By all accounts, Farideh should be happy to come to Bryseis’ aid. After all, who could object to killing the king of Hells? But things are far more complicated than they seem, and Farideh may not be as willing as Bryseis thinks . . .

The Devil You Know is the sixth book in the Brimstone Angels series.