Very interesting. I couldn't find an e-book version.
Over a year ago, I bought the e-book version of Allen's follow-up book "Making It All Work" but when I tried to transfer it from ereader.com to my iPad a month ago, I couldn't, even though I have access to all the other e-books that I purchased. Seems that Allen has forced all of the e-book vendors to remove his books from electronic distribution.
Funny, I wonder if there is a way (other than a US-based proxy service which could be construed as violating some country's crazy concept of copyright which I would never recommend) to purchase the book properly? I know there have been times that I had to go to Amazon.uk to buy something for my wife... and actually come to think of it, one of those times we were denied the right to download some music.
Perhaps, but David Allen is more than just the author of the book.
He sells his books directly, along with his CDs, file folders, stacking trays, notebooks, wallets, pens, paper planners and pads, zip pouches, software, workflow guides, and memberships.
I'd say that he has more control over the distribution of his intellectual property compared to many other authors.
In any case, it turns out that the restriction is not on electronic books vs paper-based, but on U.S. vs. non-U.S. distribution of e-books. And, yeah, most likely the decision was make by the publisher (Penguin) and not by David Allen.