Jack will be unavailable on an off for a little while.
The description is being rewritten, and a few typos corrected. Whenever you do that places like Amazon, B&N, Apple, et al, take the book down, review it and then put it back up.
If it is not available in some e-tail places it may still be available in others while the process plays out.
At the end of the updating and correcting, the electronic version should also be available for the first time right here on this website, same price, direct download.
There may be a few other direct downloads, and one might be for free. Sign up for the news letter to keep posted.
Happy New Year!