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danspalding writes "I'm an adult education teacher in SF who wrote an e-book about how to teach adults, called "How to Teach Adults." It will be available to download for free in January 2013. I Kickstarted enough money for editing, design and publicity, but not enough to pay me anything up front. I'm considering making a $1, $10 and $25 version available from Amazon as a way for folks to donate money to me, as well as a straight up PayPal link on my site. (Although I hate PayPal.) Is it possible to produce quality material for teachers to download for free in a way that's economically sustainable? Might readers accidentally pay for a copy without realizing there's a free download and get pissed off? And where should I host the free-to-download version?" Link to Original Source
It is masked but always present.
I don't know who built to it.
It came before the first kernel.