Besides family Advent traditions, maybe you're looking for some quiet meditations to read on your own during the Christmas season. Below are a few suggestions--some I have read, others are on my wishlist because of their authors. Feel free to add your own suggestions in the comments!
Behold the Lamb of God: An Advent Narrative by Russ Ramsey and Andrew Peterson
I appreciate any book that gives you a sweeping view of Scripture as one
big story with Jesus at the center—which is what this Advent devotional
does. Inspired by Andrew Peterson’s absolutely brilliant work of the
same name (more on that soon), Ramsey takes the reader through the Old
Testament stories that point to the coming Savior, then brings humanity
and poignant detail to the familiar Christmas story.
The Greatest Gift: Unwrapping the Full Love Story of Christmas and Unwrapping the Greatest Gift: A Family Celebration of Christmas, both by Ann Voskamp
The former is a devotional; the latter is a Jesse Tree resource. I have long enjoyed Ann's writing, so when we started our Jesse Tree tradition a couple of years ago, we used her free printable--but I confess I really didn't like
it, in spite of how much I love her. It was poorly edited, difficult to read
aloud because of her poetic style, and not at all geared for little ones. I'm confident this reboot is probably much different and better--I've heard wonderful things about it. Either way, I'd still love to read her Advent reflections on my own.
Counting the Days, Lighting the Candles by Elyse Fitzpatrick and Jessica Thompson
This devotional includes both family readings and individual readings. I have loved other work by the authors.
Watch for the Light: Readings for Advent and Christmas
This devotional is out of print, but looks wonderful, with readings from T.S. Eliot, Dietrich Bonhoeffer, Annie Dillard, Madeleine L'Engle, and Henri Nouwen, to name a few.
Finally, some of my favorite Advent readings are John Piper's poems. I've attempted to write poetry in strict meter and rhyme only
enough to know that it's very, very difficult to do well. Piper has (in
my opinion) an extraordinary gift for it. Not only is the poetry
beautiful, but his "imaginative reconstructions behind figures of the
Bible" are amazing. Every year I am moved and awed by the way he points
to Christ and the glory of God in these poems. He doesn't write
new ones anymore (they used to be a yearly Christmas gift to his congregation), but the 25-year archive of past Advent poems is available free on Desiring God's website:
New Testament figures
Old Testament figures
Note: I highly recommend listening, not just reading.