For reading material, I always recommend this book as a "primer":
(Rebecca Lieb, "The Truth about Search Ending Optimization"). It's a slim
but powerful volume that helps you get a good overall foundation. Then for
updates, technology and more immersive research, go to Marketingland.com
. You can find a glossary and other helpful info at the trade
organization for search, SEMPO.org
"The Art of SEO" is coming out with a new edition soon. It's a much thicker, more technical book if you want to really go deep.