I recommend their 2018 Hey! Merry Christmas! album. It's one of the best Rock n Roll Christmas albums out there, with lots of great original songs and covers that are somehow fresh and retro-sounding at the same time.
Excellent band that puts on a very lively show. If you're one of those that doesn't like people standing and dancing at a concert then best to skip the Mavericks. Lead singer, Raul Malo has an incredible voice.