Summon the Keeper — Tanya Huff

THE CAT --
Austin was a black-and-white, far-from-young cat. Not just any cat, mind you, he was the Keeper's cat, a very outspoken feline with extremely strong opinions he was always willing to voice. After all, who knew better than Austin what was best for the well-being of Claire --and for the not-quite-as-important rest of the universe?

AND THE KEEPER --
Claire Hansen was a Keeper, a member of that select group which kept the universe in one piece. And now she'd been Summoned to the Elysian Fields Guesthouse, a rundown bed-and-breakfast that seemed to attract the most "unusual" clientele. And Claire was not happy about this latest assignment, not happy at all.

Not when she'd been tricked into taking over here by a horrible little gnome of a man who'd abandoned his post before she'd even figured out who he really was.... Not when room six held a resident who'd been sleeping there for so many years that she really needed a good dusting--except that it was far too dangerous for anyone to get that close to her.... Not when the basement housed too much temptation for anyone's mental health.... Not when she found herself surrounded by "helpers" as distracting as Dean, the hunky-yet-innocent handyman, and Jacques, a ghost with a real lust for life .... And especially not when it looked like this might be not only her most challenging mission but one she'd be stuck handling forever....