What do I think about Christmas novellas, novels, and anthologies? I LOVE them. I start collecting them in the new year and put them aside to begin in October. This year has been especially fun, since I have my own novella to add to the group.
Last year, I was part of an anthology of short Christmas castle stories in Keeping Christmas Vol. 1. This year I have Promise Me Christmas, a companion to the Revolutionary Faith Series.
Recently, I’ve read A Louisiana Christmas to Remember by Morgan Tarpley Smith, Betsy St. Amant, and Lenora Worth, Mistletoe Village by Kathleen Robison, and Christmas on King Street by Ashley Clark. Contemporary and historical in the mix.
Currently, I’m reading Christmas at the Inn by Ashley Clark with Tangels and Tinsel by Jennifer Sienes ready for me. I’ve ordered Christmas at Permelia Cottage by Carole Lehr Johnson to carry me through the season. 
What are you reading this season? I’ll gladly add more to my list.
Nice list! Thanks for including me!