The Art of Forgiving (Uni Files #1.5)
Anna Bloom

Left to his own devices, wallowing in self-pity, drinking whiskey and killing ballads on his guitar Ben is looking forward to the worst Christmas in history. That is until an unexpected offer of help arrives.
Given the best Christmas gift he could ever wish for, the chance to spend one more day with the girl that got away. Ben knows he just has one day to convince Lilah that they are meant to be together, before he has to make some big decisions about his own future. Just one day to set right the mistakes that he has made, but will it be enough?
Ben may end up finding out that The Art of Forgiving isn't something you can teach, it is something that you have to earn.