This person is trying to sell chainmaille and beading patterns:
simplebeadpatterns.deviantart.…This annoys me. The beading I can't speak for, but I firmly believe that all chainmaille patterns should be distributed freely and fairly. It is an artisan craft to be shared and enjoyed.
There are hundreds of free tutorials on the internet for chainmaille. If you want to throw your money away on a .pdf, go for it, but I sincerely hope you don't.
ETA: If you don't know where any free tutorials are, would like to know, just ask. I can direct you to quite a few