Dear Monster Claus by Maeve Black

Her entire life, Xo has brought others happiness and love, complete with endings tied in pretty little bows.
This year, she wants that for herself.
Love.
Romance.
A happy ending.
And there's a grumpy Santa who's more than willing to grant her this wish in exchange for finding his love for Christmas again.
Where there are candy canes, there are happily ever afters... and they're both about to find theirs.