Wriging

From the Clip How to Publish a Book in 2 Weeks for $200 posted by Tyme:

Here’s a technique you can use to publish a non-fiction book in a fortnight. I recently wrote a book in a few days and had a published version in one week. To do this, you must use a print-on-demand self-publisher and not a traditional publisher. Business books work best with the method. Fiction requires an entirely different approach.

Am I the only one amazed that he can claim to write a whole book in a couple of days? Sure you can publish almost anything in 2 weeks if you finish it in a couple of days, but what kind of books get finished in that time period and at what length?