Hi z3t3
Welcome to 5 Star. Glad you are invested in learning more and good to hear that Geno's book helped you.
Affiliate marketing has not changed all that much so Shawn's info is still really good. You can get alot of it free in his new video series, based on the book. Each video is a short overview of a chapter that give the highlights and enough info to either help you along or give you enough info to know if the book is something you need.
Successful Affiliate Marketing for Merchants - FREE Video Series
Hope this helps and best of luck!