So basically it's a really good advice book?
No, but it's one heck of a good book to own and read.
Rules as well, as others have posted. The skill challenge section is a huge improvement on the DMG, though still not enough IMO.So basically it's a really good advice book?
Mad props to BOZ and his team of Wikipedia authors for that, I suppose.The Sigil section is also a nice addition, but honestly I could gather that information from the internet, even with just wikipedia.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.