Thank you for the information, Klaus.
I've read Don Massey's book [about 2 years ago]. His book is excellent!
I think it would be great if Don updating the book to include e-book marketing and online delivery.
Recently, I read a comment made by successful information marketer. He said, "You can make a nice living 're-writing' a book about any given subject."
He went on to point out the fact of how many books exist on using a single software product. Take Word 2000 for example.
There are dozens of books, manuals, etc. that have been written on how to use the product.
Some are technical, some are visual, some are short and concise. The point he made was this: there are people who will understand a subject better "in your words" than they will in someone elses.
With that in mind, it wouldn't be very difficult to create an info product on the fly.
If you take an info product that already exists, and recreate it with the "what he/she SHOULD HAVE SAID was ..." approach, you may actually create a superior product in HALF THE TIME.
In fact, I wouldn't doubt it if half the books I've already read weren't written by authors using that technique.