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I'd go with the book approach.
Being a techy geek myself, and having run a large programming community for several years, I know that people are much more likely to buy books over articles and tutorials. Such things are already free, and if you're charging - you won't see them for the dust.
A book on the other hand.. is something more concrete that people are willing to fork out for. Make sure you overdeliver, and they'll come crawling back for your second offering.
Oh, and fill the book with cloaked affiliate links. Perhaps put some of the content on a site for free to encourage people. CPA is great - so even if they don't convert, they might still earn you a little.
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