A Demon's Salvation. Demons Hearts, #4

Caelan is going crazy, or at least that's what it feels like. He's having blackouts, waking up in places he can't remember going to, losing hours and sometimes even days, and he has no idea what he does during the times he can't remember. Until he wakes up to find a severed head on his bed. Jordan didn't mean to get involved in this case. He's a detective, a human detective, and he shouldn't care what happens to demons.
He doesn't even like demons. But when more and more of them are found torn apart, he worries and decides to give the League the info so they can do something about it before more people get hurt. The last person Jordan would have suspected of being behind the brutal murders is Aiden's pretty, delicate-looking brother. When he finds Caelan with yet another body, he surprises himself by taking Caelan home rather than delivering him to the League.
He's even more surprised when the League decides to help. They might not be able to, though, because Caelan is possessed, and the demon inside him is strong. Is it too strong for Caelan to survive? And why does Jordan feel the need to stick by Caelan and make sure he'll be okay? What will that mean for his job-for his life?