There is a free .pdf file that you can find online that covers most of what you need to know as far as the basics. Written by the makers of Crannog Ales, IIRC.
There are also some old books out there that are available through Google Books, Gutenberg Project, etc., that you can download and read.
Search the Form here for Hop Book or Hop Books and you should find a bunch of info, I think there was a post a couple weeks back with a bunch of the old stuff linked.4
TeeJo