Didn't you read what they already said?? They said, if you are a beginner, go for it! if you are already advanced webmaster, then, it won't help. Read the responses, man!
SeoBook was updated last month - I've just downloaded the new version. It's well worth the money I think. Brew
I've been meaning to get it for some time now but haven't gotten round to it...must get it this month
I think it's very useful, especially for SEO starters. Maybe a pro would prefer another book that skips the whole "What is SEO and how SE's work" introduction routine and go into more details, but since the OP didn't state his experience with SEO, I think Aaron Wall's book could be a good read.