Dead Serious Case #4 Professor Prometheus Plume. Crawshanks Guide to the Recently Departed, #4

In the business of unfinished business... Inspector Danny Hayes has something very important to ask his boyfriend Tristan Everett. Over the past six months they've survived reapers, chaos monsters, and biblical storms, not to mention averting an apocalypse. So, what's left to do but pop the big question?Tristan is ready for a break from world-saving, spectral crises, and most definitely from ghosts.
He wants some one-on-one time with his boyfriend, preferably horizontally. So when their Boxing Day celebrations result in a drunken booking of a romantic New Year's getaway at a quiet little hotel near the wilds of the north Yorkshire moors, Tristan can't wait. But as usual nothing ever goes according to plan. Snowed in during an unexpected murder mystery weekend at what turns out to be one of the most haunted hotels in Northern England is not what they had in mind, but when one of the actors turns up really dead not just fake dead, they once again find themselves caught up in another investigation.
With only one night to figure out who the killer is while wrangling a multitude of overly helpful ghosts, Tristan begins to wonder if romance really is dead.