The Boss's Mistletoe Maneuvers (Harlequin Desire Book 2339)

Seduction in a Santa Claus suit?

When millionaire Chaz Monroe goes undercover at the ad agency he bought, he has to figure out why his star employee, Kim McKinley, won't work on the very important Christmas campaign. He'll go to any length to get answers from the beautiful go-getter--if he has to kiss them out of her, so be it.
 
Kim can't believe Chaz's nerve. So why is she always falling into his arms...and into his bed? Soon, this exasperating man unlocks her secrets just in time for a Christmas she'll never forget...and one he may never live down!