Tested in Fire by E.J. Russell

Six months ago, Stefan Cobbe was at rock bottom: grief-stricken, guilt-ridden, debt-laden, and oh yeah—possessed by a homicidal dead painter. But after reconciling with his first love, Luke, and moving to Sarasota with him, Stefan is ghost-free and preparing for his first major show. Yes, he still has debts, and no, Luke doesn’t understand Stefan’s desire for independence. But compared to last year? No contest.

Luke Morganstern ought to be happy. After all, his art-investigation business has recovered and he’s got his boyfriend back. But Stefan stubbornly refuses to move in with him or accept Luke’s financial help, and it’s really starting to bug him. Who knew that the biggest test of their relationship wouldn’t be time or distance, but his own insecurities? After Luke’s next job—a trip to Italy to retrieve a mysterious artifact—he plans to convince Stefan that it’s time to totally commit.

But when Luke returns, he changes, and Stefan begins to suspect that the person in Luke’s skin isn’t Luke at all. He can hardly go to the police and claim his lover is the victim of a supernatural hijacking though. He needs alternative help to find Luke and get him back, because he refuses to let anyone—or anything—come between them again.