How come this book is available on download I mean what about copyright?

detaro · on Sept 9, 2016

It's under a license that allows freely sharing it for non-commercial purposes.

HCIdivision17 · on Sept 9, 2016

I've wondered about this: when it says non-commercial purposes, does that mean me downloading a copy to read for my work, or me printing and selling?

I haven't any problem buying it, since it's useful for my job, but that distinction has been a bit fuzzy to me (and I'll normally just err on the side of buy, just to be safe).

tchalla · on Sept 9, 2016

Commercial would mean you make a gain from distribution of the book. Money can be one of the gains.

HCIdivision17 · on Sept 9, 2016

Thanks - distribution vs consumption always mix me up with the copyright rules.

nxzero · on Sept 9, 2016

On the copyright page of the PDF of the book it states it is:

>> "licensed under the Creative Commons Attribution–Noncommercial–ShareAlike 4.0 International License."