Managing Death by Trent Jamieson
"It's not easy being Death. For starters, people keep dying. And then, they keep getting up again.
Steven de Selby got promoted. This makes the increasing number of stirrers (and the disturbing rumors of a zombie god rising sometime soon) his problem. That time management seminar he keeps meaning to take would also remind him that he's got a Death Moot to plan, a Christmas party to organize, and an end-of-the-world thing to avert.
Steven must start managing Death, before Death starts managing him, or this time the Apocalypse will be more than Regional."
Mass market, ex-library with usual markings