The Oxford Book of Christmas Stories, ed. Dennis Pepper
A gift from a few years back which conveniently worked its way to the top of one of my lists this month. A lot of good short (mostly very short) Christmas-related stories and extracts from longer works (eg Pickwick Papers, Adrian Mole). Many are about children, some are spooky. There's a particularly vicious piece by Frank O'Connor which is unusually dark (both for him and for this book). Suitable for browsing, but in particular for reading aloud at this time of year if you have people who will stop and listen.
Classifying this as non-genre, though as noted there are a number of spooky stories too (and one with an alien).