Stride and Glide should be on your bookshelf if you're interested in cross country ski-ing and/or nordic walking.  It contains a wealth of practical information as you'd expect from authors, Paddy Field and Stuart Montgomery, who have many miles of expert ski-ing and walking under their respective belts, as well as unrivalled experience in the international ski world and travel trade. 

This comprehensive guide is a really useful resource for any level of skier and walker.  It's an ideal Christmas gift - yes it's coming up fast - and you can now purchase it through Moving Feet.  Click to go to an overview of the contents and buy online.