What is Dungeo: Loo

I got this book around 1985, 12years old at the time, I had all the 1st edition AD & D hardbacks, plus the basic sets, and I didn't have a clue how to use most of it! This book, among the easiest to read guides to role-playing ever written, simplified a lot of the concepts and mechanical aspects of the game - among it's innovations was the idea of allowing demi-humans to adopt character classes in Basic D & D - ie. you could have an Elven Thief if you wanted to. The example dungeon setting meticulously described the Shrine of Kollchap, and stands alone as a dungeon that actually makes sense - not another random collection of monsters waiting in 10'x10' rooms for the marauding adventurers. Also, being published outside TSR, this book was able to provide an objective guide of the pros and cons of Basic vs. AD & D, and the significant investment the latter represented. A fine book for any novice role-player, and a great stroll down memory lane for the dinosaurs like me still out there!