With only slight modifications, this manual can be used regardless of which setting (or edition) you are partial to. It provides a framework in which you can create just about everything you need for a great adventuring area with the added benefit of reminding you of things you may have otherwise forgotten. IT IS HELPFUL IF YOU HAVE PLAYED 2nd EDITION D&D BEFORE YOU USE THIS... simply because this is the context in which it was written. With that said, IMO, it is one of the best purchases a homebrewing DM/GM can make and for the price is a "no brainer" to put in your cart.
[5 of 5 Stars!]