I wrote Zuke 'Em to help players searching for an opening, or those who already played the C-Z. Consistent with my desire to make this the most helpful book possible, I welcome any comments or questions from readers. Simply email me.
You can also visit the Zuke Dukes forum, dedicated to the opening and the book.
Updates
An opening book should be like software: once you buy it, the author should offer free updates as new ideas are found. Here are some updates and other articles that might be useful to you:
New idea against K-side Fianchetto
Major Update: New Idea in the mainline! (Chessville Article)