You could probably keep it open-source but charge for the print copy and pay-what-you-want for the PDF.

That is a good idea, how do I the pay-what-you-want thing?

currently the book is on github and gitbooks, so I doubt if anyone would pay for the pdf :-)

There's a free version of Gumroad and you can sell things with a pay what you want scheme: https://help.gumroad.com/11164-Payments/pay-what-you-want-pr...

The premium version of Gumroad is $10 per month, and reduces the cut they take.

There's leanpub too, though I don't know if you can upload an already made pdf. Worth checking out though.

leanpub allows you to get the data from github, my book is already on github, 950+ stars

Oh that's great to know, thanks.

I've bought PDFs where I already had all the information just to support the author. The hard part is letting the people who know about your book already know that they can buy a hard copy/support your work.

Well, all I can do is put upthe leanpub link to the book on the github page

I think learnpub does this. Minimum price and suggested price.

Thanks :)

Started making a book on leanpub.

https://leanpub.com/antitextbookGo/

This is awesome!

Do you mean my book? Or the fact that one can self publish books? :)