Meet Me at Sunrise by Lynn Hagen

Colton has been fighting for nearly a year not to become Master of the vampire coven. When a capture warrant brings him to Black Dragon, he has no choice but to face the Veneto triplets. Colton is split between his allegiance to his pack and his responsibilities to the coven he left leaderless after killing Magnus. When Matt basically disowns Colton, he has no choice but to turn to the coven he’s loathed for so long. But the brothers aren’t fighting fair, and when they claim Colton as their mate, his loyalties are torn.

Lucian, Corbin, and Antonio have been trying to lure Colton to the coven, but their efforts have been fruitless until Colton shows up with a capture warrant. They finally have their wolf where he belongs, but can they keep Colton at their side, or will he rejoin his pack to hunt down the creatures from the veil that have been set loose in Mercury?