@MockingBird Yes this book is probably the best iteration of a FR campaign book. I read this book cover to cover and large portions of it on other occasions. This was around the time I stopped reading entire books like I did in the 2E days. The 3E City of Splendors books was pretty good too, albeit there were many paragraphs cut-N-pasted from 1E and 2E versions of the source material, but this was common for FR back then.
I played 3.0 when it came out, loved it and I will say it was a definite step forward in game design, but it was very crunchy. I played in a 3.5 game for a session or three about 2018. I ran into a friend of mine I used to game with, and one thing led to another, and I found myself sitting in my house making a character. I felt like I needed a slide rule, a compass and a telescope to make a character. It was such an arduous task I needed some Pedialyte after. Its not a system I would like to play again, though I did keep some of my books for reference. Alot of bloat crept in, and iirc Dragon and Dungeon were still around in print back then, (By Paizo) so that didnt help. Im not saying its a bad system or trying to discourage anyone from playing it but just sharing my opinion on it which is...it had its place in the annals of D&D history, it was 5E on Performance Enhancing Drugs. I think its main downfall was it put to the power in the hands of the players by quantifying almost any rule you could want, which is something 5E smartly got away from. I digress....
Heroes of Horror was cool too, as was Minds of Madness? think that's the name. 3.x had a lot of very succinctly themed books so I would caution to be selective of what you buy from that era depending on what you like in your game.