Heavy Head (Book 4: Battle Series, The Originals)

Noah Dumaine was like Marcel Gerard's brother. They fought together, they built the city together, and though Noah gave him most of the control, everyone looked to him as the second in command. It was that way up until the Originals came to town, and the Strix, and everyone else. After Davina and Cami died, and Marcel turned himself into the beast to get revenge on all of them in a way that they wouldn't like, Noah gave him an ultimatum. To either act like the Marcel that was like his brother, or no contact at all, because Noah didn't know how far he was willing to go. Five years later, everything is different, and while Marcel controls most of the city, Noah helps where he can, though he still doesn't approve of what Marcel did, but can't do anything to change it.