The Prince’s Christmas Wager by Caroline Lee

This Christmas, the one gift she doesn’t want is Prince Charming!
His Majesty, Prince Marc Enzio of Velarno, is good at only one thing–being charming–and he’s looking forward to practicing his art this holiday season as he visits his cousins in the small island country of Aegiria. Enzio is the youngest of five and has a reputation as a playboy flirt…useless for any actual work. But with those perfect smiles and suave manners, he could charm any lady–and has!
Until he meets Dr. Nova Willetts, a most unusual American.
Nova is the Aegirian Royal Archivist, tasked with collecting oral histories of the small nation’s oldest citizens in preparation for the upcoming Christmas celebrations, and doesn’t have any time for charmers. Besides, a cheating ex has made her permanently swear off all flirtatious men, so meeting Enzio has her warning bells ringing.
But as they work together to track down a particularly romantic Christmas legend, Nova realizes this Prince is Charming…just not the way he’s trying to be. And Enzio is falling fast for the standoffish doctor who looks at him with yearning when she thinks no one’s watching.
…Which means it was probably a bad idea to accept that wager to make her his by Christmas, wasn’t it?