Just because you're asking about fan-made pdfs... I'll point out that we have a bit of a blurry situation. Obviously, anything that is free to read on the internet is free to read, but that doesn't mean the author is waving all copyrights, and that such work is free to reproduce in a CC-BY-SA license. Which is why, I think, the fan grimoire project won't happen in its original form: Open License Change Statements - #16 by David_Chart