This is a very valuable resource for anyone that wants to expand the rules for 1st edition AD&D. It contains new classes, including the ever popular barbarian, a few new rules, many new spells, and new non-human pantheons. It also includes new weapons and magic items. Some people don't consider this to be true AD&D because of some variant rules introduced in this book. I've never considered it anything but 'core' 1st edition AD&D and completely necessary. ( )

Why not do another one?

The hardback dvanced Dungeons and Dragons books became very popular, so, of course, more and more of them started coming up, and this was one of the more unnecessary books, as far as that went.

Interesting if you wanted a bit of obscure stuff, or the odd different rule, etc., otherwise nothing that you couldn't happily do without. ( )

I've never read it cover-to-cover, but it's seen a lot of action back when I was playing D&D. ( )