How To Be Deadly — Trina M. Lee

Bodies are dropping and one thing ties them together. Cinder.

Someone from his past is back and seeking vengeance, and they've set their sights on Spike. The stakes are raised when Cinder goes missing. Now his dream team will have to learn to work together despite the challenges they face.

This means Rowen and Arrow must set aside their differences. Loving the same woman has created tension between the brothers. Spike needs them to get over it and fast. Because someone is messing with all of them, and it's only a matter of time until Cinder's captor starts picking them off, one by one.