Nick of Time (Harlequin Intrigue)
"Nick St. Claire had come to North Pole, Alaska, with a few questions for Santa, only Claus had gone AWOL. Clearly, someone was trying to ruin the holidays, though the clever cowboy never had much use for them. Until he met Mary Christmas...
"Santa's only child, Mary, was left to tend shop in his absence--suddenly making her a killer's next target. Nick volunteered to protect her, but he was also a stranger, with a bundle of his own not-so-saintly secrets. Could Mary enlighten him on the joys of the season, or would a missing Santa squash her holiday spirit?"
Yep, it's definitely the time of year for the holiday
(The previous departmental favorite, A Cowboy for Christmas has nothing on this.)
Feudalism: Serf & Turf