5. Greyhawk Adventures
1st Edition
Greyhawk
1988
This is a classic book for your library. It is a textbook example of having a tome that is thick with good stuff for games. It includes tons of stuff from new rules on how to run 0 level adventures to a ton of spells, magic items, new creatures, detailed rules on deities and their clerics that gives you just enough info, rules and info on major players, several mini-adventures you can use and my favorite – many geographical anomalies and why they were formed, and what sorts of creatures and interesting things are there, to give you many ideas for adventures of your own creation. Just a very solid book from start to finish.