For in-depth information on specific winter activities, consider (all affiliate earnings donated):
The Avalanche Handbook
Glacier Travel & Crevasse Rescue: Reading Glaciers, Team Travel, Crevasse Rescue Techniques, Routefinding, Expedition Skills 2nd Edition
Snowshoeing: From Novice to Master (Mountaineers Outdoor Expert)
Note these are all from the excellent Mountaineer Books series, the gold standard of outdoor books as far as I'm concerned. You can be sure they are written by experts.