MM Carter Quinn - Vanished Series [1-3]

Vanished (Vanished #1)
Henry Cooley has good friends and a good life. He’s secure in his job and his relationship. He and Tom, the love of his life, are about to celebrate their twenty-first anniversary as a couple. Their son, CJ, is in his second year at Cal Arts. Henry's only problems are his growing dissatisfaction with his job and the fact that Tom's parents still hate him, even after all these years. At least those are his only problems until the morning he wakes up to discover Tom has vanished.

Vanished 2 (Vanished #2)
It's only been three weeks since Henry woke up to discover his husband, Tom, had vanished. He's still struggling to come to terms with his new reality when he receives a haunting phone call: “Henry. Help me.” It’s Tom's voice, but Henry is afraid to believe. His world has already come crashing down around him twice in the last six months. Is Tom really alive, or is Henry losing his grip on reality?

Vanished 3 (Vanished #3)
It’s been five months since Henry Cooley woke up to find that his husband, Tom MacKinnon, had vanished. Henry has gone through hell and back since then trying to uncover what really happened. But nothing could prepare him for the truth.