This book is a straightforward reprint of the original book that was meant for an earlier version of the ruleset. This means that there are the most widely used mosnters, but it also means that you can't use their stats straight away, as they were written for an older version of the ruleset: you will have to consult every time a specific page of the core rulebook (page 123 and following...) and put together the information... not a minor nuisance. I understand that there were some issues about publishing rights to be respected, but... the outcome spoils a bit all the good in this super-classic monster compendium, and after several years this hasn't been rectified yet.

I love this book, I had it in the 80s accompanying me on my battles through the game books. This PDF is excellent, the text sections are actual text, not scanned, and the quality of the images is great.