I find that book very questionable. I mean, the description says "High quality content by WIKIPEDIA articles!" I have a feeling they may have just appropriated a lot of Joe's hard work and documentation to produce that book.

Take a look too at the authors' other books on Amazon. Dozens published in the past few months, mostly about history. Not exactly a resume that says "computer expert" to me.

I personally think this is someone trying to cash in on mojoPortal and other things by aggregating public information and trying to get someone to pay for it.

Now if Joe A., Joe D., and other mojoPortal expert users would collaborate on a mojoPortal book, that would get me interested.

Then again, there is better documentation here at mojoPortal.com than for almost any other open source CMS I've looked at, so a book might just be redundant.