Do not underestimate the author's claims of density - this boi is THICC.
As a relatively new participant as PC, this book is a great companion to the core rulebooks to test out possible player builds, spells, etc. almost like the "firing range" sandbox in a typical FPS game. While DMing is above my pay grade for the moment, I can also see what a great resource it is for filling in some less-than-fleshed out areas of your campaign, or in my group's case, when the party decides to fixate on a part of the adventure that the DM had no intention of us exploring and needs to whip up some encounters on the fly!
[5 of 5 Stars!]