Q. Won't the book get out of date?
A. No, O'Reilly ebook owners get updates for free for life as the game changes and I edit the manuscript. Others can register their book at O'Reilly.com for $5.

Q. Does Toady, the designer, approve?
A. It was Toady who suggested O'Reilly contact me to write the book when they were looking for an author, and he wrote the foreword. He's a big fan!

Q. Does Toady get a cut of profits? A. I am making donations to Toady each month based on my own royalties. Toady will also benefit from the donations brought by all the new players!

Watch my O'Reilly webcast on engineering, minecarts and design in Dwarf Fortress.