Retool by Gregory Ashe

What would you do to get everything you wanted?
Life is good for Dashiell Dawson Dane (just Dash). Things with his boyfriend, Bobby, are better than ever. Teaching at a local college has provided routine and stability. And to his complete surprise, his self-published novel is doing well. Really well. So, when a mystery writers’ conference comes to Hastings Rock, Dash is thrilled to attend.
He’s less thrilled when Vivienne Carver, his former nemesis—the woman who framed him for murder and then tried to kill him—appears at the conference, released from prison and determined to reclaim both fame and fortune. And, as usual, Vivienne has a plan.
But when Vivienne is murdered the first night of the conference, and Dash is—once again—the prime suspect, he’ll have to find the real killer to prove his innocence.
Even worse, Dash might be right back where he started.