The Mistletoe Kiss by Betty Neels
Ermentrude helped the family by working at St. Lukes Hospital. She spoke her mind to the often impatient Professor Ruerd ter Mennolt, but he did offer practical aid with Emmy's difficulties.
Ruerd couldn't understand why, with a beautiful fiancee, he troubled with Emmy, but he still invited her home for Christmas in Holland...then he had to find an honorable way to end his engagement...

Outback Angel by Margaret Way
With her stunning Latin looks, Angelica De Campo was beautiful enough to live up to her nickname of Angel. But Jake McCord, Australia's most eligible bachelor, couldn't decide if his newest employee was an angel or a temptress!
Jake had hired Angelica to transform his Outback home into a lavish Christmas party venue; their relationship had to remain strictly professional. Only, the more closely they worked together, the harder they both had to fight to resist the attraction between them - or risk the consequences....

The Christmas Marriage Mission by Helen Brooks
She's a beauty... When Kay Sherwood steps into Mitchell Grey's office he's so fiercely attracted to her fiery good looks he insists that she join him for dinner. Can she tame the beast? But up until now Mitchell has indulged only in no-strings affairs, and the suave tycoon is taken aback by the intense passion that's threatening to develop. Becoming more intimate with Kay - a single mom - would be just too dangerous!
But Mitchell hasn't counted on the fact that Christmas is coming; some special seasonal magic is about to change his mind!