Shaun, aka Hobo, has released a 157 page PDF guide on SEO. You can download the book over here.

There are many SEO books out there, some free, some at a price. I would list some that I recommend, but I honestly don’t want to leave any out. So I’ll just list a few, but please don’t be insulted if I don’t list yours.

Google SEO Guide (PDF)SEOmoz SEO GuideSEOBook.com (not sure if they still got the book)

Those are just a few and now we have this new one.

Forum discussion at Sphinn.