The Bottle Ghosts (Dick Hardesty Mystery)

Hired to find a missing man–an alcoholic–Dick Hardesty discovers that an unusual number of alcoholic gay men have vanished within a relatively short period and never heard from again. Clues lead him to a support group for gay couples, where one partner is alcoholic and the other is not. Dick and his partner Jonathan infiltrate the group by claiming Jonathan is an alcoholic. When two more men from the group appear to suffer the same fate as the previous victims, Dick is determined to find out why…and who is responsible.