New York Times bestseller Uni the Unicorn is back in this original story! Celebrate the holiday season with the perfect gift, and ride along with Uni on a magical adventure to help Santa's reindeer! Celebrate the magic of believing with Uni the Unicorn! When one of Santa's reindeer gets lost on the busiest night of the year, it's up to Uni to use a little unicorn magic and help out. Can Uni find the reindeer in time to save Christmas? Based on the New York Times bestselling Uni the Unicorn, everyone's favorite unicorn is back in time for the holidays!