Thanks for the typo report -- it's fixed. The article is nearly 5,000 words, so there are bound to be a few that slipped through.
The business decisions regarding the book are up to the publisher. I think it's unlikely to be turned into a freebie though, since the content is intended to be timeless, and my web site should be able to keep a good baseline level of sales flowing almost indefinitely. If it keeps selling well on Amazon, the bookstores will likely continue to stock it, so it probably won't die too quickly.
There's enough free content on this site already to fill about 20 books, so I think I've got the freebie side pretty well covered.
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