Thank you for the feedback.

As part of agreeing to blog with us, professionals and bloggers are given pretty wide latitude to plug their own books, CDs, DVDs, and other programs. It seems fitting -- if you're interested in the topic, and like what you're reading in their blog, you may be interested in actually purchasing something they created.

I'm not aware of a commercial website that doesn't do this sort of small promotion for their authors.

Best,
DocJohn