I don't have direct access to external databases or the internet to look up specific books or their significance. However, I can provide some general insights into why a book like "Complete Cross-Country Skiing and Ski Touring" might be significant.

1. Comprehensive Guide: Such books often serve as comprehensive guides for both beginners and experienced skiers, covering techniques, equipment, and safety.

2. Expertise: Co-authored by experts like Wilson, the book likely contains valuable insights and tips from experienced professionals in the field.

3. Promotion of the Sport: Books like these can help promote cross-country skiing and ski touring by making the sports more accessible to a wider audience.

4. Historical Context: Depending on when it was published, the book might provide historical context or document the evolution of skiing techniques and equipment.

5. Resource for Enthusiasts: It can be a valuable resource for enthusiasts looking to improve their skills or learn more about the sport.

If you have access to a library or online resources, you might find more specific information about the book's impact and reception.