Our specialty is Copper Canyon and it is our business focus. Dave has made it his intention to link up with Mexicans who know the Sierra Madres and can be a local resource.
If you have questions, needs or concerns about Copper Canyon, call Dave at 217.369.9897 or email firstname.lastname@example.org.
This site as well as authenticcoppercanyon.com both have lots of info on the place, the train, etc.
Books on Copper Canyon:
Here are several I recommend: