#3 The AngelFire Chronicles
Angel Codes
After Kian is taken by his sister to serve in the otherworld of demons, Ali is left on her own with the Angelfire to figure out how to get him back. The fourth book, third novel, in the AngelFire Chronicles will keep you engaged till the end. Be sure to read Dumah's Demons before continuing the series.
She Speaks to Angels
Dumah's Demons
Falling Angels
Angel Codes