Merry Elf-ing Christmas by Beth Bolden

Aidan might be a bad elf, but he’s never been naughty.

Aidan has always landed on Santa’s nice list, thank you very much. But that doesn’t mean he’s cut out to be a North Pole elf; instead of worrying about the dwindling magic of Christmas, he’d much rather be back in Tir na Nog, calculating where the next end of the rainbow is going to land.
Instead he’s freezing his butt off in Santa’s sleigh.
His situation seems grim despite all the decking the halls, until on Christmas Eve, during a milk and cookies run, he meets Dexter, an engineering student.
They couldn’t be more different, and Dexter couldn’t be more forbidden, but Aidan is drawn to the handsome human anyway. Over the next year, their emails start out as a entertaining way to pass the time in all his interminable elf meetings, but soon, hearing from Dex becomes the very best part of his day.
And when they meet up on the next Christmas Eve? Aidan and Dex discover that their infatuation is so much more than just attraction. If they believe in each other and in the love they share, together their magic might be powerful enough to save Christmas.