In reply to kingjam:
The SMC hillwalker's guide to the Munros is really good, but isn't winter specific and as far as I can see doesn't make any mention of winter considerations. Classic example of this would be the standard approach to Buachaille Etive Mor via Coire na Tulaich. Under firm snow this can be quite exposed and close to grade I winter climbing, but it can also load with windslab and avalanche spectacularly.
The book is good, but to get the best out of your time you're going to want to ally it with some sound knowledge of avalanche potential and work out from the map what gradients you'll be comfortable on on snow. Apologies if you knew this already!