Allen & Mike's is THE book to start with.
I'll offer a few tips myself for anyone starting out with winter camping;
Start slow. Try camping in the snow really close to the road - close enough so that if you decide to bail you will be able to do it no matter how foul the weather gets. This also allows you to take extra clothing and gear just in case. It's not easy to figure out what will work for you in terms of clothing and sleeping gear for the winter, and it's better to start out taking a few extra items and then culling what you didn't need than to go out with not enough and get cold or worse.
And especially in the fall and early winter, when the weather has cooled off but there's not much snow on the ground yet, it's easy to get caught by heading out for what seems like a short distance, making camp, getting a big snowfall overnight, and finding that it is a lot harder to get back out through the foot or two of fresh snow - snowshoes or not. That easy day's walk can turn into two long hard days of slogging. So I would suggest being very conservative about how far you from the trailhead.
Being out in the winter is a great experience, if you have the gear and skills to deal with the conditions. It's a different game from summer backpacking, and it takes some time to learn the rules of the new game.