I think giving away the books for free is good. However I just had a look and the courses ain't cheap. A good way to generate customers huh? The way I read your post it seemed that you guys were broke and needed a donation.
"broke and needed a donation" --> This is not the case, and we wouldn't open source the books if we wanted to make more money. I could talk more about this, as I think the business angle is interesting and on topic for HN, but I'm at a conference right now.
Tiny update on this. So far today 3808 books have been downloaded and about $81 in donations have been made. In a normal day we'd sell less 4 or 5 books and make between $100 and $200.
